Marking a bunch of static variables as readonly

Readonly helps out with TS's type guards and is also a good best practice. Specifically, readonly strings/numbers have their literal type instead of a generic `string` | `number` type, which can help catch dead code and some common programming mistakes

src/vs/base/browser/touch.ts

@@ -67,7 +67,7 @@ export class Gesture extends Disposable {
 
 	private static readonly SCROLL_FRICTION = -0.005;
 	private static INSTANCE: Gesture;
-	private static HOLD_DELAY = 700;
+	private static readonly HOLD_DELAY = 700;
 
 	private dispatched = false;
 	private targets: HTMLElement[];

src/vs/base/browser/ui/tree/abstractTree.ts

@@ -238,7 +238,7 @@ class EventCollection<T> implements Collection<T> {
 
 class TreeRenderer<T, TFilterData, TRef, TTemplateData> implements IListRenderer<ITreeNode<T, TFilterData>, ITreeListTemplateData<TTemplateData>> {
 
-	private static DefaultIndent = 8;
+	private static readonly DefaultIndent = 8;
 
 	readonly templateId: string;
 	private renderedElements = new Map<T, ITreeNode<T, TFilterData>>();

src/vs/base/common/lifecycle.ts

@@ -138,7 +138,7 @@ export class DisposableStore implements IDisposable {
 
 export abstract class Disposable implements IDisposable {
 
-	static None = Object.freeze<IDisposable>({ dispose() { } });
+	static readonly None = Object.freeze<IDisposable>({ dispose() { } });
 
 	private readonly _store = new DisposableStore();
 

src/vs/base/parts/ipc/electron-main/ipc.electron-main.ts

@@ -23,7 +23,7 @@ function createScopedOnMessageEvent(senderId: number, eventName: string): Event<
 
 export class Server extends IPCServer {
 
-	private static Clients = new Map<number, IDisposable>();
+	private static readonly Clients = new Map<number, IDisposable>();
 
 	private static getOnDidClientConnect(): Event<ClientConnectionEvent> {
 		const onHello = Event.fromNodeEventEmitter<WebContents>(ipcMain, 'ipc:hello', ({ sender }) => sender);

src/vs/base/parts/storage/node/storage.ts

@@ -32,12 +32,12 @@ export interface ISQLiteStorageDatabaseLoggingOptions {
 
 export class SQLiteStorageDatabase implements IStorageDatabase {
 
-	static IN_MEMORY_PATH = ':memory:';
+	static readonly IN_MEMORY_PATH = ':memory:';
 
 	get onDidChangeItemsExternal(): Event<IStorageItemsChangeEvent> { return Event.None; } // since we are the only client, there can be no external changes
 
-	private static BUSY_OPEN_TIMEOUT = 2000; // timeout in ms to retry when opening DB fails with SQLITE_BUSY
-	private static MAX_HOST_PARAMETERS = 256; // maximum number of parameters within a statement
+	private static readonly BUSY_OPEN_TIMEOUT = 2000; // timeout in ms to retry when opening DB fails with SQLITE_BUSY
+	private static readonly MAX_HOST_PARAMETERS = 256; // maximum number of parameters within a statement
 
 	private path: string;
 	private name: string;

src/vs/base/parts/tree/browser/treeView.ts

@@ -398,8 +398,8 @@ function reactionEquals(one: _.IDragOverReaction, other: _.IDragOverReaction | n
 
 export class TreeView extends HeightMap {
 
-	static BINDING = 'monaco-tree-row';
-	static LOADING_DECORATION_DELAY = 800;
+	static readonly BINDING = 'monaco-tree-row';
+	static readonly LOADING_DECORATION_DELAY = 800;
 
 	private static counter: number = 0;
 	private instance: number;

src/vs/code/browser/workbench/workbench.ts

@@ -103,10 +103,10 @@ class LocalStorageCredentialsProvider implements ICredentialsProvider {
 
 class PollingURLCallbackProvider extends Disposable implements IURLCallbackProvider {
 
-	static FETCH_INTERVAL = 500; 			// fetch every 500ms
-	static FETCH_TIMEOUT = 5 * 60 * 1000; 	// ...but stop after 5min
+	static readonly FETCH_INTERVAL = 500; 			// fetch every 500ms
+	static readonly FETCH_TIMEOUT = 5 * 60 * 1000; 	// ...but stop after 5min
 
-	static QUERY_KEYS = {
+	static readonly QUERY_KEYS = {
 		REQUEST_ID: 'vscode-requestId',
 		SCHEME: 'vscode-scheme',
 		AUTHORITY: 'vscode-authority',

src/vs/code/electron-browser/sharedProcess/contrib/storageDataCleaner.ts

@@ -13,7 +13,7 @@ import { IBackupWorkspacesFormat } from 'vs/platform/backup/node/backup';
 export class StorageDataCleaner extends Disposable {
 
 	// Workspace/Folder storage names are MD5 hashes (128bits / 4 due to hex presentation)
-	private static NON_EMPTY_WORKSPACE_ID_LENGTH = 128 / 4;
+	private static readonly NON_EMPTY_WORKSPACE_ID_LENGTH = 128 / 4;
 
 	constructor(
 		@IEnvironmentService private readonly environmentService: IEnvironmentService

src/vs/editor/browser/controller/mouseHandler.ts

@@ -65,7 +65,7 @@ export interface IPointerHandlerHelper {
 
 export class MouseHandler extends ViewEventHandler {
 
-	static MOUSE_MOVE_MINIMUM_TIME = 100; // ms
+	static readonly MOUSE_MOVE_MINIMUM_TIME = 100; // ms
 
 	protected _context: ViewContext;
 	protected viewController: ViewController;

src/vs/editor/browser/controller/textAreaHandler.ts

@@ -66,7 +66,7 @@ interface LocalClipboardMetadata {
  * we can fetch the previous metadata.
  */
 class LocalClipboardMetadataManager {
-	public static INSTANCE = new LocalClipboardMetadataManager();
+	public static readonly INSTANCE = new LocalClipboardMetadataManager();
 
 	private _lastState: LocalClipboardMetadata | null;
 

src/vs/editor/browser/viewParts/viewCursors/viewCursors.ts

@@ -18,7 +18,7 @@ import { registerThemingParticipant } from 'vs/platform/theme/common/themeServic
 
 export class ViewCursors extends ViewPart {
 
-	static BLINK_INTERVAL = 500;
+	static readonly BLINK_INTERVAL = 500;
 
 	private _readOnly: boolean;
 	private _cursorBlinking: TextEditorCursorBlinkingStyle;

src/vs/editor/browser/widget/diffEditorWidget.ts

@@ -1562,7 +1562,7 @@ const DECORATIONS = {
 
 class DiffEditorWidgetSideBySide extends DiffEditorWidgetStyle implements IDiffEditorWidgetStyle, IVerticalSashLayoutProvider {
 
-	static MINIMUM_EDITOR_WIDTH = 100;
+	static readonly MINIMUM_EDITOR_WIDTH = 100;
 
 	private _disableSash: boolean;
 	private readonly _sash: Sash;

src/vs/editor/common/controller/cursor.ts

@@ -141,7 +141,7 @@ class AutoClosedAction {
 
 export class Cursor extends viewEvents.ViewEventEmitter implements ICursors {
 
-	public static MAX_CURSOR_COUNT = 10000;
+	public static readonly MAX_CURSOR_COUNT = 10000;
 
 	private readonly _onDidReachMaxCursorCount: Emitter<void> = this._register(new Emitter<void>());
 	public readonly onDidReachMaxCursorCount: Event<void> = this._onDidReachMaxCursorCount.event;

src/vs/editor/common/core/rgba.ts

@@ -10,7 +10,7 @@
 export class RGBA8 {
 	_rgba8Brand: void;
 
-	static Empty = new RGBA8(0, 0, 0, 0);
+	static readonly Empty = new RGBA8(0, 0, 0, 0);
 
 	/**
 	 * Red: integer in [0-255]

src/vs/editor/contrib/colorPicker/colorDetector.ts

@@ -27,7 +27,7 @@ export class ColorDetector extends Disposable implements IEditorContribution {
 
 	private static readonly ID: string = 'editor.contrib.colorDetector';
 
-	static RECOMPUTE_TIME = 1000; // ms
+	static readonly RECOMPUTE_TIME = 1000; // ms
 
 	private readonly _localToDispose = this._register(new DisposableStore());
 	private _computePromise: CancelablePromise<IColorData[]> | null;

src/vs/editor/contrib/dnd/dnd.ts

@@ -38,7 +38,7 @@ export class DragAndDropController extends Disposable implements editorCommon.IE
 	private _dndDecorationIds: string[];
 	private _mouseDown: boolean;
 	private _modifierPressed: boolean;
-	static TRIGGER_KEY_VALUE = isMacintosh ? KeyCode.Alt : KeyCode.Ctrl;
+	static readonly TRIGGER_KEY_VALUE = isMacintosh ? KeyCode.Alt : KeyCode.Ctrl;
 
 	static get(editor: ICodeEditor): DragAndDropController {
 		return editor.getContribution<DragAndDropController>(DragAndDropController.ID);

src/vs/editor/contrib/documentSymbols/outlineTree.ts

@@ -44,7 +44,7 @@ export class OutlineIdentityProvider implements IIdentityProvider<OutlineItem> {
 }
 
 export class OutlineGroupTemplate {
-	static id = 'OutlineGroupTemplate';
+	static readonly id = 'OutlineGroupTemplate';
 	constructor(
 		readonly labelContainer: HTMLElement,
 		readonly label: HighlightedLabel,
@@ -52,7 +52,7 @@ export class OutlineGroupTemplate {
 }
 
 export class OutlineElementTemplate {
-	static id = 'OutlineElementTemplate';
+	static readonly id = 'OutlineElementTemplate';
 	constructor(
 		readonly container: HTMLElement,
 		readonly iconLabel: IconLabel,

src/vs/editor/contrib/folding/folding.ts

@@ -50,7 +50,7 @@ interface FoldingStateMemento {
 
 export class FoldingController extends Disposable implements IEditorContribution {
 
-	static MAX_FOLDING_REGIONS = 5000;
+	static readonly MAX_FOLDING_REGIONS = 5000;
 
 
 	public static get(editor: ICodeEditor): FoldingController {

src/vs/editor/contrib/folding/foldingDecorations.ts

@@ -10,18 +10,18 @@ import { ICodeEditor } from 'vs/editor/browser/editorBrowser';
 
 export class FoldingDecorationProvider implements IDecorationProvider {
 
-	private static COLLAPSED_VISUAL_DECORATION = ModelDecorationOptions.register({
+	private static readonly COLLAPSED_VISUAL_DECORATION = ModelDecorationOptions.register({
 		stickiness: TrackedRangeStickiness.NeverGrowsWhenTypingAtEdges,
 		afterContentClassName: 'inline-folded',
 		linesDecorationsClassName: 'codicon codicon-chevron-right'
 	});
 
-	private static EXPANDED_AUTO_HIDE_VISUAL_DECORATION = ModelDecorationOptions.register({
+	private static readonly EXPANDED_AUTO_HIDE_VISUAL_DECORATION = ModelDecorationOptions.register({
 		stickiness: TrackedRangeStickiness.NeverGrowsWhenTypingAtEdges,
 		linesDecorationsClassName: 'codicon codicon-chevron-down'
 	});
 
-	private static EXPANDED_VISUAL_DECORATION = ModelDecorationOptions.register({
+	private static readonly EXPANDED_VISUAL_DECORATION = ModelDecorationOptions.register({
 		stickiness: TrackedRangeStickiness.NeverGrowsWhenTypingAtEdges,
 		linesDecorationsClassName: 'codicon codicon-chevron-down alwaysShowFoldIcons'
 	});

src/vs/editor/contrib/goToDefinition/goToDefinitionMouse.ts

@@ -30,7 +30,7 @@ import { withNullAsUndefined } from 'vs/base/common/types';
 class GotoDefinitionWithMouseEditorContribution implements editorCommon.IEditorContribution {
 
 	private static readonly ID = 'editor.contrib.gotodefinitionwithmouse';
-	static MAX_SOURCE_PREVIEW_LINES = 8;
+	static readonly MAX_SOURCE_PREVIEW_LINES = 8;
 
 	private readonly editor: ICodeEditor;
 	private readonly toUnhook = new DisposableStore();

src/vs/editor/contrib/links/links.ts

@@ -106,7 +106,7 @@ class LinkDetector implements editorCommon.IEditorContribution {
 		return editor.getContribution<LinkDetector>(LinkDetector.ID);
 	}
 
-	static RECOMPUTE_TIME = 1000; // ms
+	static readonly RECOMPUTE_TIME = 1000; // ms
 
 	private readonly editor: ICodeEditor;
 	private enabled: boolean;

src/vs/editor/contrib/message/messageController.ts

@@ -23,7 +23,7 @@ export class MessageController extends Disposable implements editorCommon.IEdito
 
 	private static readonly _id = 'editor.contrib.messageController';
 
-	static MESSAGE_VISIBLE = new RawContextKey<boolean>('messageVisible', false);
+	static readonly MESSAGE_VISIBLE = new RawContextKey<boolean>('messageVisible', false);
 
 	static get(editor: ICodeEditor): MessageController {
 		return editor.getContribution<MessageController>(MessageController._id);

src/vs/editor/contrib/snippet/snippetController2.ts

@@ -44,9 +44,9 @@ export class SnippetController2 implements IEditorContribution {
 		return editor.getContribution<SnippetController2>('snippetController2');
 	}
 
-	static InSnippetMode = new RawContextKey('inSnippetMode', false);
-	static HasNextTabstop = new RawContextKey('hasNextTabstop', false);
-	static HasPrevTabstop = new RawContextKey('hasPrevTabstop', false);
+	static readonly InSnippetMode = new RawContextKey('inSnippetMode', false);
+	static readonly HasNextTabstop = new RawContextKey('hasNextTabstop', false);
+	static readonly HasPrevTabstop = new RawContextKey('hasPrevTabstop', false);
 
 	private readonly _inSnippet: IContextKey<boolean>;
 	private readonly _hasNextTabstop: IContextKey<boolean>;

src/vs/editor/contrib/suggest/suggestAlternatives.ts

@@ -11,7 +11,7 @@ import { ISelectedSuggestion } from './suggestWidget';
 
 export class SuggestAlternatives {
 
-	static OtherSuggestions = new RawContextKey<boolean>('hasOtherSuggestions', false);
+	static readonly OtherSuggestions = new RawContextKey<boolean>('hasOtherSuggestions', false);
 
 	private readonly _ckOtherSuggestions: IContextKey<boolean>;
 

src/vs/editor/standalone/browser/simpleServices.ts

@@ -551,7 +551,7 @@ export class SimpleWorkspaceContextService implements IWorkspaceContextService {
 
 	public _serviceBrand: undefined;
 
-	private static SCHEME = 'inmemory';
+	private static readonly SCHEME = 'inmemory';
 
 	private readonly _onDidChangeWorkspaceName = new Emitter<void>();
 	public readonly onDidChangeWorkspaceName: Event<void> = this._onDidChangeWorkspaceName.event;

src/vs/platform/contextkey/browser/contextKeyService.ts

@@ -87,7 +87,7 @@ class NullContext extends Context {
 
 class ConfigAwareContextValuesContainer extends Context {
 
-	private static _keyPrefix = 'config.';
+	private static readonly _keyPrefix = 'config.';
 
 	private readonly _values = new Map<string, any>();
 	private readonly _listener: IDisposable;

src/vs/platform/instantiation/common/instantiationService.ts

@@ -241,7 +241,7 @@ const enum TraceType {
 
 class Trace {
 
-	private static _None = new class extends Trace {
+	private static readonly _None = new class extends Trace {
 		constructor() { super(-1, null); }
 		stop() { }
 		branch() { return this; }

src/vs/platform/state/node/stateService.ts

@@ -127,7 +127,7 @@ export class StateService implements IStateService {
 
 	_serviceBrand: undefined;
 
-	private static STATE_FILE = 'storage.json';
+	private static readonly STATE_FILE = 'storage.json';
 
 	private fileStorage: FileStorage;
 

src/vs/platform/storage/node/storageIpc.ts

@@ -29,7 +29,7 @@ interface ISerializableItemsChangeEvent {
 
 export class GlobalStorageDatabaseChannel extends Disposable implements IServerChannel {
 
-	private static STORAGE_CHANGE_DEBOUNCE_TIME = 100;
+	private static readonly STORAGE_CHANGE_DEBOUNCE_TIME = 100;
 
 	private readonly _onDidChangeItems: Emitter<ISerializableItemsChangeEvent> = this._register(new Emitter<ISerializableItemsChangeEvent>());
 	readonly onDidChangeItems: Event<ISerializableItemsChangeEvent> = this._onDidChangeItems.event;

src/vs/platform/storage/node/storageMainService.ts

@@ -87,7 +87,7 @@ export class StorageMainService extends Disposable implements IStorageMainServic
 
 	_serviceBrand: undefined;
 
-	private static STORAGE_NAME = 'state.vscdb';
+	private static readonly STORAGE_NAME = 'state.vscdb';
 
 	private readonly _onDidChangeStorage: Emitter<IStorageChangeEvent> = this._register(new Emitter<IStorageChangeEvent>());
 	readonly onDidChangeStorage: Event<IStorageChangeEvent> = this._onDidChangeStorage.event;

src/vs/platform/storage/node/storageService.ts

@@ -21,8 +21,8 @@ export class NativeStorageService extends Disposable implements IStorageService
 
 	_serviceBrand: undefined;
 
-	private static WORKSPACE_STORAGE_NAME = 'state.vscdb';
-	private static WORKSPACE_META_NAME = 'workspace.json';
+	private static readonly WORKSPACE_STORAGE_NAME = 'state.vscdb';
+	private static readonly WORKSPACE_META_NAME = 'workspace.json';
 
 	private readonly _onDidChangeStorage: Emitter<IWorkspaceStorageChangeEvent> = this._register(new Emitter<IWorkspaceStorageChangeEvent>());
 	readonly onDidChangeStorage: Event<IWorkspaceStorageChangeEvent> = this._onDidChangeStorage.event;

src/vs/platform/telemetry/common/telemetryService.ts

@@ -24,8 +24,8 @@ export interface ITelemetryServiceConfig {
 
 export class TelemetryService implements ITelemetryService {
 
-	static IDLE_START_EVENT_NAME = 'UserIdleStart';
-	static IDLE_STOP_EVENT_NAME = 'UserIdleStop';
+	static readonly IDLE_START_EVENT_NAME = 'UserIdleStart';
+	static readonly IDLE_STOP_EVENT_NAME = 'UserIdleStop';
 
 	_serviceBrand: undefined;
 

src/vs/workbench/api/common/apiCommands.ts

@@ -39,7 +39,7 @@ interface IOpenFolderAPICommandOptions {
 }
 
 export class OpenFolderAPICommand {
-	public static ID = 'vscode.openFolder';
+	public static readonly ID = 'vscode.openFolder';
 	public static execute(executor: ICommandsExecutor, uri?: URI, forceNewWindow?: boolean): Promise<any>;
 	public static execute(executor: ICommandsExecutor, uri?: URI, options?: IOpenFolderAPICommandOptions): Promise<any>;
 	public static execute(executor: ICommandsExecutor, uri?: URI, arg: boolean | IOpenFolderAPICommandOptions = {}): Promise<any> {
@@ -73,7 +73,7 @@ interface INewWindowAPICommandOptions {
 }
 
 export class NewWindowAPICommand {
-	public static ID = 'vscode.newWindow';
+	public static readonly ID = 'vscode.newWindow';
 	public static execute(executor: ICommandsExecutor, options?: INewWindowAPICommandOptions): Promise<any> {
 		const commandOptions: IOpenEmptyWindowOptions = {
 			forceReuseWindow: options && options.reuseWindow,
@@ -94,7 +94,7 @@ CommandsRegistry.registerCommand({
 });
 
 export class DiffAPICommand {
-	public static ID = 'vscode.diff';
+	public static readonly ID = 'vscode.diff';
 	public static execute(executor: ICommandsExecutor, left: URI, right: URI, label: string, options?: vscode.TextDocumentShowOptions): Promise<any> {
 		return executor.executeCommand('_workbench.diff', [
 			left, right,
@@ -108,7 +108,7 @@ export class DiffAPICommand {
 CommandsRegistry.registerCommand(DiffAPICommand.ID, adjustHandler(DiffAPICommand.execute));
 
 export class OpenAPICommand {
-	public static ID = 'vscode.open';
+	public static readonly ID = 'vscode.open';
 	public static execute(executor: ICommandsExecutor, resource: URI, columnOrOptions?: vscode.ViewColumn | vscode.TextDocumentShowOptions, label?: string): Promise<any> {
 		let options: ITextEditorOptions | undefined;
 		let position: EditorViewColumn | undefined;
@@ -138,7 +138,7 @@ CommandsRegistry.registerCommand('_workbench.removeFromRecentlyOpened', function
 });
 
 export class RemoveFromRecentlyOpenedAPICommand {
-	public static ID = 'vscode.removeFromRecentlyOpened';
+	public static readonly ID = 'vscode.removeFromRecentlyOpened';
 	public static execute(executor: ICommandsExecutor, path: string | URI): Promise<any> {
 		if (typeof path === 'string') {
 			path = path.match(/^[^:/?#]+:\/\//) ? URI.parse(path) : URI.file(path);
@@ -151,7 +151,7 @@ export class RemoveFromRecentlyOpenedAPICommand {
 CommandsRegistry.registerCommand(RemoveFromRecentlyOpenedAPICommand.ID, adjustHandler(RemoveFromRecentlyOpenedAPICommand.execute));
 
 export class OpenIssueReporter {
-	public static ID = 'vscode.openIssueReporter';
+	public static readonly ID = 'vscode.openIssueReporter';
 	public static execute(executor: ICommandsExecutor, extensionId: string): Promise<void> {
 		return executor.executeCommand('workbench.action.openIssueReporter', [extensionId]);
 	}
@@ -185,7 +185,7 @@ CommandsRegistry.registerCommand('_workbench.getRecentlyOpened', async function
 });
 
 export class SetEditorLayoutAPICommand {
-	public static ID = 'vscode.setEditorLayout';
+	public static readonly ID = 'vscode.setEditorLayout';
 	public static execute(executor: ICommandsExecutor, layout: EditorGroupLayout): Promise<any> {
 		return executor.executeCommand('layoutEditorGroups', layout);
 	}

src/vs/workbench/api/common/extHostTreeViews.ts

@@ -166,8 +166,8 @@ interface TreeNode extends IDisposable {
 
 class ExtHostTreeView<T> extends Disposable {
 
-	private static LABEL_HANDLE_PREFIX = '0';
-	private static ID_HANDLE_PREFIX = '1';
+	private static readonly LABEL_HANDLE_PREFIX = '0';
+	private static readonly ID_HANDLE_PREFIX = '1';
 
 	private readonly dataProvider: vscode.TreeDataProvider<T>;
 

src/vs/workbench/browser/actions/developerActions.ts

@@ -29,7 +29,7 @@ import { IConfigurationRegistry, Extensions as ConfigurationExtensions } from 'v
 class InspectContextKeysAction extends Action {
 
 	static readonly ID = 'workbench.action.inspectContextKeys';
-	static LABEL = nls.localize('inspect context keys', "Inspect Context Keys");
+	static readonly LABEL = nls.localize('inspect context keys', "Inspect Context Keys");
 
 	constructor(
 		id: string,
@@ -91,7 +91,7 @@ class InspectContextKeysAction extends Action {
 class ToggleScreencastModeAction extends Action {
 
 	static readonly ID = 'workbench.action.toggleScreencastMode';
-	static LABEL = nls.localize('toggle screencast mode', "Toggle Screencast Mode");
+	static readonly LABEL = nls.localize('toggle screencast mode', "Toggle Screencast Mode");
 
 	static disposable: IDisposable | undefined;
 
@@ -195,7 +195,7 @@ class ToggleScreencastModeAction extends Action {
 class LogStorageAction extends Action {
 
 	static readonly ID = 'workbench.action.logStorage';
-	static LABEL = nls.localize({ key: 'logStorage', comment: ['A developer only action to log the contents of the storage for the current window.'] }, "Log Storage Database Contents");
+	static readonly LABEL = nls.localize({ key: 'logStorage', comment: ['A developer only action to log the contents of the storage for the current window.'] }, "Log Storage Database Contents");
 
 	constructor(
 		id: string,

src/vs/workbench/browser/actions/layoutActions.ts

@@ -396,7 +396,7 @@ KeybindingsRegistry.registerCommandAndKeybindingRule({
 export class ToggleMenuBarAction extends Action {
 
 	static readonly ID = 'workbench.action.toggleMenuBar';
-	static LABEL = nls.localize('toggleMenuBar', "Toggle Menu Bar");
+	static readonly LABEL = nls.localize('toggleMenuBar', "Toggle Menu Bar");
 
 	private static readonly menuBarVisibilityKey = 'window.menuBarVisibility';
 
@@ -446,7 +446,7 @@ MenuRegistry.appendMenuItem(MenuId.MenubarAppearanceMenu, {
 
 export abstract class BaseResizeViewAction extends Action {
 
-	protected static RESIZE_INCREMENT = 6.5; // This is a media-size percentage
+	protected static readonly RESIZE_INCREMENT = 6.5; // This is a media-size percentage
 
 	constructor(
 		id: string,

src/vs/workbench/browser/actions/windowActions.ts

@@ -193,7 +193,7 @@ class QuickOpenRecentAction extends BaseOpenRecentAction {
 class ToggleFullScreenAction extends Action {
 
 	static readonly ID = 'workbench.action.toggleFullScreen';
-	static LABEL = nls.localize('toggleFullScreen', "Toggle Full Screen");
+	static readonly LABEL = nls.localize('toggleFullScreen', "Toggle Full Screen");
 
 	constructor(
 		id: string,
@@ -211,7 +211,7 @@ class ToggleFullScreenAction extends Action {
 export class ReloadWindowAction extends Action {
 
 	static readonly ID = 'workbench.action.reloadWindow';
-	static LABEL = nls.localize('reloadWindow', "Reload Window");
+	static readonly LABEL = nls.localize('reloadWindow', "Reload Window");
 
 	constructor(
 		id: string,
@@ -249,7 +249,7 @@ class ShowAboutDialogAction extends Action {
 export class NewWindowAction extends Action {
 
 	static readonly ID = 'workbench.action.newWindow';
-	static LABEL = nls.localize('newWindow', "New Window");
+	static readonly LABEL = nls.localize('newWindow', "New Window");
 
 	constructor(
 		id: string,

src/vs/workbench/browser/actions/workspaceActions.ts

@@ -26,7 +26,7 @@ import { IWorkbenchEnvironmentService } from 'vs/workbench/services/environment/
 export class OpenFileAction extends Action {
 
 	static readonly ID = 'workbench.action.files.openFile';
-	static LABEL = nls.localize('openFile', "Open File...");
+	static readonly LABEL = nls.localize('openFile', "Open File...");
 
 	constructor(
 		id: string,
@@ -44,7 +44,7 @@ export class OpenFileAction extends Action {
 export class OpenFolderAction extends Action {
 
 	static readonly ID = 'workbench.action.files.openFolder';
-	static LABEL = nls.localize('openFolder', "Open Folder...");
+	static readonly LABEL = nls.localize('openFolder', "Open Folder...");
 
 	constructor(
 		id: string,
@@ -62,7 +62,7 @@ export class OpenFolderAction extends Action {
 export class OpenFileFolderAction extends Action {
 
 	static readonly ID = 'workbench.action.files.openFileFolder';
-	static LABEL = nls.localize('openFileFolder', "Open...");
+	static readonly LABEL = nls.localize('openFileFolder', "Open...");
 
 	constructor(
 		id: string,
@@ -80,7 +80,7 @@ export class OpenFileFolderAction extends Action {
 export class OpenWorkspaceAction extends Action {
 
 	static readonly ID = 'workbench.action.openWorkspace';
-	static LABEL = nls.localize('openWorkspaceAction', "Open Workspace...");
+	static readonly LABEL = nls.localize('openWorkspaceAction', "Open Workspace...");
 
 	constructor(
 		id: string,
@@ -98,7 +98,7 @@ export class OpenWorkspaceAction extends Action {
 export class CloseWorkspaceAction extends Action {
 
 	static readonly ID = 'workbench.action.closeFolder';
-	static LABEL = nls.localize('closeWorkspace', "Close Workspace");
+	static readonly LABEL = nls.localize('closeWorkspace', "Close Workspace");
 
 	constructor(
 		id: string,
@@ -150,7 +150,7 @@ export class OpenWorkspaceConfigFileAction extends Action {
 export class AddRootFolderAction extends Action {
 
 	static readonly ID = 'workbench.action.addRootFolder';
-	static LABEL = ADD_ROOT_FOLDER_LABEL;
+	static readonly LABEL = ADD_ROOT_FOLDER_LABEL;
 
 	constructor(
 		id: string,
@@ -168,7 +168,7 @@ export class AddRootFolderAction extends Action {
 export class GlobalRemoveRootFolderAction extends Action {
 
 	static readonly ID = 'workbench.action.removeRootFolder';
-	static LABEL = nls.localize('globalRemoveFolderFromWorkspace', "Remove Folder from Workspace...");
+	static readonly LABEL = nls.localize('globalRemoveFolderFromWorkspace', "Remove Folder from Workspace...");
 
 	constructor(
 		id: string,

src/vs/workbench/browser/parts/activitybar/activitybarActions.ts

@@ -226,7 +226,7 @@ class SwitchSideBarViewAction extends Action {
 export class PreviousSideBarViewAction extends SwitchSideBarViewAction {
 
 	static readonly ID = 'workbench.action.previousSideBarView';
-	static LABEL = nls.localize('previousSideBarView', 'Previous Side Bar View');
+	static readonly LABEL = nls.localize('previousSideBarView', 'Previous Side Bar View');
 
 	constructor(
 		id: string,
@@ -245,7 +245,7 @@ export class PreviousSideBarViewAction extends SwitchSideBarViewAction {
 export class NextSideBarViewAction extends SwitchSideBarViewAction {
 
 	static readonly ID = 'workbench.action.nextSideBarView';
-	static LABEL = nls.localize('nextSideBarView', 'Next Side Bar View');
+	static readonly LABEL = nls.localize('nextSideBarView', 'Next Side Bar View');
 
 	constructor(
 		id: string,

src/vs/workbench/browser/parts/editor/breadcrumbs.ts

@@ -66,14 +66,14 @@ export abstract class BreadcrumbsConfig<T> {
 		// internal
 	}
 
-	static IsEnabled = BreadcrumbsConfig._stub<boolean>('breadcrumbs.enabled');
-	static UseQuickPick = BreadcrumbsConfig._stub<boolean>('breadcrumbs.useQuickPick');
-	static FilePath = BreadcrumbsConfig._stub<'on' | 'off' | 'last'>('breadcrumbs.filePath');
-	static SymbolPath = BreadcrumbsConfig._stub<'on' | 'off' | 'last'>('breadcrumbs.symbolPath');
-	static SymbolSortOrder = BreadcrumbsConfig._stub<'position' | 'name' | 'type'>('breadcrumbs.symbolSortOrder');
-	static Icons = BreadcrumbsConfig._stub<boolean>('breadcrumbs.icons');
+	static readonly IsEnabled = BreadcrumbsConfig._stub<boolean>('breadcrumbs.enabled');
+	static readonly UseQuickPick = BreadcrumbsConfig._stub<boolean>('breadcrumbs.useQuickPick');
+	static readonly FilePath = BreadcrumbsConfig._stub<'on' | 'off' | 'last'>('breadcrumbs.filePath');
+	static readonly SymbolPath = BreadcrumbsConfig._stub<'on' | 'off' | 'last'>('breadcrumbs.symbolPath');
+	static readonly SymbolSortOrder = BreadcrumbsConfig._stub<'position' | 'name' | 'type'>('breadcrumbs.symbolSortOrder');
+	static readonly Icons = BreadcrumbsConfig._stub<boolean>('breadcrumbs.icons');
 
-	static FileExcludes = BreadcrumbsConfig._stub<glob.IExpression>('files.exclude');
+	static readonly FileExcludes = BreadcrumbsConfig._stub<glob.IExpression>('files.exclude');
 
 	private static _stub<T>(name: string): { bindTo(service: IConfigurationService): BreadcrumbsConfig<T> } {
 		return {

src/vs/workbench/browser/parts/editor/breadcrumbsControl.ts

@@ -130,15 +130,15 @@ export interface IBreadcrumbsControlOptions {
 
 export class BreadcrumbsControl {
 
-	static HEIGHT = 22;
+	static readonly HEIGHT = 22;
 
 	static readonly Payload_Reveal = {};
 	static readonly Payload_RevealAside = {};
 	static readonly Payload_Pick = {};
 
-	static CK_BreadcrumbsPossible = new RawContextKey('breadcrumbsPossible', false);
-	static CK_BreadcrumbsVisible = new RawContextKey('breadcrumbsVisible', false);
-	static CK_BreadcrumbsActive = new RawContextKey('breadcrumbsActive', false);
+	static readonly CK_BreadcrumbsPossible = new RawContextKey('breadcrumbsPossible', false);
+	static readonly CK_BreadcrumbsVisible = new RawContextKey('breadcrumbsVisible', false);
+	static readonly CK_BreadcrumbsActive = new RawContextKey('breadcrumbsActive', false);
 
 	private readonly _ckBreadcrumbsPossible: IContextKey<boolean>;
 	private readonly _ckBreadcrumbsVisible: IContextKey<boolean>;

src/vs/workbench/browser/parts/editor/editorDropTarget.ts

@@ -24,7 +24,7 @@ interface IDropOperation {
 
 class DropOverlay extends Themable {
 
-	private static OVERLAY_ID = 'monaco-workbench-editor-drop-overlay';
+	private static readonly OVERLAY_ID = 'monaco-workbench-editor-drop-overlay';
 
 	private container!: HTMLElement;
 	private overlay!: HTMLElement;

src/vs/workbench/browser/parts/notifications/notificationsCenter.ts

@@ -26,7 +26,7 @@ import { assertAllDefined, assertIsDefined } from 'vs/base/common/types';
 
 export class NotificationsCenter extends Themable {
 
-	private static MAX_DIMENSIONS = new Dimension(450, 400);
+	private static readonly MAX_DIMENSIONS = new Dimension(450, 400);
 
 	private readonly _onDidChangeVisibility: Emitter<void> = this._register(new Emitter<void>());
 	readonly onDidChangeVisibility: Event<void> = this._onDidChangeVisibility.event;

src/vs/workbench/browser/parts/notifications/notificationsToasts.ts

@@ -41,8 +41,8 @@ enum ToastVisibility {
 
 export class NotificationsToasts extends Themable {
 
-	private static MAX_WIDTH = 450;
-	private static MAX_NOTIFICATIONS = 3;
+	private static readonly MAX_WIDTH = 450;
+	private static readonly MAX_NOTIFICATIONS = 3;
 
 	private static PURGE_TIMEOUT: { [severity: number]: number } = (() => {
 		const intervals = Object.create(null);

src/vs/workbench/browser/parts/panel/panelActions.ts

@@ -21,7 +21,7 @@ import { ActivePanelContext, PanelPositionContext } from 'vs/workbench/common/pa
 export class ClosePanelAction extends Action {
 
 	static readonly ID = 'workbench.action.closePanel';
-	static LABEL = nls.localize('closePanel', "Close Panel");
+	static readonly LABEL = nls.localize('closePanel', "Close Panel");
 
 	constructor(
 		id: string,
@@ -40,7 +40,7 @@ export class ClosePanelAction extends Action {
 export class TogglePanelAction extends Action {
 
 	static readonly ID = 'workbench.action.togglePanel';
-	static LABEL = nls.localize('togglePanel', "Toggle Panel");
+	static readonly LABEL = nls.localize('togglePanel', "Toggle Panel");
 
 	constructor(
 		id: string,
@@ -209,7 +209,7 @@ export class SwitchPanelViewAction extends Action {
 export class PreviousPanelViewAction extends SwitchPanelViewAction {
 
 	static readonly ID = 'workbench.action.previousPanelView';
-	static LABEL = nls.localize('previousPanelView', 'Previous Panel View');
+	static readonly LABEL = nls.localize('previousPanelView', 'Previous Panel View');
 
 	constructor(
 		id: string,
@@ -227,7 +227,7 @@ export class PreviousPanelViewAction extends SwitchPanelViewAction {
 export class NextPanelViewAction extends SwitchPanelViewAction {
 
 	static readonly ID = 'workbench.action.nextPanelView';
-	static LABEL = nls.localize('nextPanelView', 'Next Panel View');
+	static readonly LABEL = nls.localize('nextPanelView', 'Next Panel View');
 
 	constructor(
 		id: string,

src/vs/workbench/browser/parts/quickinput/quickInput.ts

@@ -323,7 +323,7 @@ class QuickInput extends Disposable implements IQuickInput {
 
 class QuickPick<T extends IQuickPickItem> extends QuickInput implements IQuickPick<T> {
 
-	private static INPUT_BOX_ARIA_LABEL = localize('quickInputBox.ariaLabel', "Type to narrow down results.");
+	private static readonly INPUT_BOX_ARIA_LABEL = localize('quickInputBox.ariaLabel', "Type to narrow down results.");
 
 	private _value = '';
 	private _placeholder: string;
@@ -762,7 +762,7 @@ class QuickPick<T extends IQuickPickItem> extends QuickInput implements IQuickPi
 
 class InputBox extends QuickInput implements IInputBox {
 
-	private static noPromptMessage = localize('inputModeEntry', "Press 'Enter' to confirm your input or 'Escape' to cancel");
+	private static readonly noPromptMessage = localize('inputModeEntry', "Press 'Enter' to confirm your input or 'Escape' to cancel");
 
 	private _value = '';
 	private _valueSelection: Readonly<[number, number]>;

src/vs/workbench/browser/parts/titlebar/menubarControl.ts

@@ -81,7 +81,7 @@ export abstract class MenubarControl extends Disposable {
 
 	protected menuUpdater: RunOnceScheduler;
 
-	protected static MAX_MENU_RECENT_ENTRIES = 10;
+	protected static readonly MAX_MENU_RECENT_ENTRIES = 10;
 
 	constructor(
 		protected readonly menuService: IMenuService,

src/vs/workbench/browser/parts/views/panelViewlet.ts

@@ -46,7 +46,7 @@ export interface IViewletPanelOptions extends IPanelOptions {
 
 export abstract class ViewletPanel extends Panel implements IView {
 
-	private static AlwaysShowActionsConfig = 'workbench.view.alwaysShowHeaderActions';
+	private static readonly AlwaysShowActionsConfig = 'workbench.view.alwaysShowHeaderActions';
 
 	private _onDidFocus = this._register(new Emitter<void>());
 	readonly onDidFocus: Event<void> = this._onDidFocus.event;

src/vs/workbench/common/notifications.ts

@@ -124,7 +124,7 @@ export class NotificationHandle implements INotificationHandle {
 
 export class NotificationsModel extends Disposable implements INotificationsModel {
 
-	private static NO_OP_NOTIFICATION = new NoOpNotification();
+	private static readonly NO_OP_NOTIFICATION = new NoOpNotification();
 
 	private readonly _onDidNotificationChange: Emitter<INotificationChangeEvent> = this._register(new Emitter<INotificationChangeEvent>());
 	readonly onDidNotificationChange: Event<INotificationChangeEvent> = this._onDidNotificationChange.event;
@@ -380,11 +380,11 @@ export interface INotificationMessage {
 
 export class NotificationViewItem extends Disposable implements INotificationViewItem {
 
-	private static MAX_MESSAGE_LENGTH = 1000;
+	private static readonly MAX_MESSAGE_LENGTH = 1000;
 
 	// Example link: "Some message with [link text](http://link.href)."
 	// RegEx: [, anything not ], ], (, http://|https://|command:, no whitespace)
-	private static LINK_REGEX = /\[([^\]]+)\]\(((?:https?:\/\/|command:)[^\)\s]+)(?: "([^"]+)")?\)/gi;
+	private static readonly LINK_REGEX = /\[([^\]]+)\]\(((?:https?:\/\/|command:)[^\)\s]+)(?: "([^"]+)")?\)/gi;
 
 	private _expanded: boolean | undefined;
 

src/vs/workbench/common/resources.ts

@@ -18,13 +18,13 @@ import { withNullAsUndefined } from 'vs/base/common/types';
 
 export class ResourceContextKey extends Disposable implements IContextKey<URI> {
 
-	static Scheme = new RawContextKey<string>('resourceScheme', undefined);
-	static Filename = new RawContextKey<string>('resourceFilename', undefined);
-	static LangId = new RawContextKey<string>('resourceLangId', undefined);
-	static Resource = new RawContextKey<URI>('resource', undefined);
-	static Extension = new RawContextKey<string>('resourceExtname', undefined);
-	static HasResource = new RawContextKey<boolean>('resourceSet', false);
-	static IsFileSystemResource = new RawContextKey<boolean>('isFileSystemResource', false);
+	static readonly Scheme = new RawContextKey<string>('resourceScheme', undefined);
+	static readonly Filename = new RawContextKey<string>('resourceFilename', undefined);
+	static readonly LangId = new RawContextKey<string>('resourceLangId', undefined);
+	static readonly Resource = new RawContextKey<URI>('resource', undefined);
+	static readonly Extension = new RawContextKey<string>('resourceExtname', undefined);
+	static readonly HasResource = new RawContextKey<boolean>('resourceSet', false);
+	static readonly IsFileSystemResource = new RawContextKey<boolean>('isFileSystemResource', false);
 
 	private readonly _resourceKey: IContextKey<URI | null>;
 	private readonly _schemeKey: IContextKey<string | null>;

src/vs/workbench/contrib/callHierarchy/browser/callHierarchy.contribution.ts

@@ -26,13 +26,13 @@ const _ctxCallHierarchyVisible = new RawContextKey<boolean>('callHierarchyVisibl
 
 class CallHierarchyController implements IEditorContribution {
 
-	static Id = 'callHierarchy';
+	static readonly Id = 'callHierarchy';
 
 	static get(editor: ICodeEditor): CallHierarchyController {
 		return editor.getContribution<CallHierarchyController>(CallHierarchyController.Id);
 	}
 
-	private static _StorageDirection = 'callHierarchy/defaultDirection';
+	private static readonly _StorageDirection = 'callHierarchy/defaultDirection';
 
 	private readonly _ctxHasProvider: IContextKey<boolean>;
 	private readonly _ctxIsVisible: IContextKey<boolean>;

src/vs/workbench/contrib/callHierarchy/browser/callHierarchyTree.ts

@@ -122,7 +122,7 @@ class CallRenderingTemplate {
 
 export class CallRenderer implements ITreeRenderer<Call, FuzzyScore, CallRenderingTemplate> {
 
-	static id = 'CallRenderer';
+	static readonly id = 'CallRenderer';
 
 	templateId: string = CallRenderer.id;
 

src/vs/workbench/contrib/cli/node/cli.contribution.ts

@@ -41,7 +41,7 @@ function isAvailable(): Promise<boolean> {
 class InstallAction extends Action {
 
 	static readonly ID = 'workbench.action.installCommandLine';
-	static LABEL = nls.localize('install', "Install '{0}' command in PATH", product.applicationName);
+	static readonly LABEL = nls.localize('install', "Install '{0}' command in PATH", product.applicationName);
 
 	constructor(
 		id: string,
@@ -122,7 +122,7 @@ class InstallAction extends Action {
 class UninstallAction extends Action {
 
 	static readonly ID = 'workbench.action.uninstallCommandLine';
-	static LABEL = nls.localize('uninstall', "Uninstall '{0}' command from PATH", product.applicationName);
+	static readonly LABEL = nls.localize('uninstall', "Uninstall '{0}' command from PATH", product.applicationName);
 
 	constructor(
 		id: string,

src/vs/workbench/contrib/codeEditor/browser/selectionClipboard.ts

@@ -17,7 +17,7 @@ import { EndOfLinePreference } from 'vs/editor/common/model';
 import { IClipboardService } from 'vs/platform/clipboard/common/clipboardService';
 
 export class SelectionClipboard extends Disposable implements IEditorContribution {
-	private static SELECTION_LENGTH_LIMIT = 65536;
+	private static readonly SELECTION_LENGTH_LIMIT = 65536;
 	private static readonly ID = 'editor.contrib.selectionClipboard';
 
 	constructor(editor: ICodeEditor, @IClipboardService clipboardService: IClipboardService) {

src/vs/workbench/contrib/comments/browser/commentsTreeViewer.ts

@@ -56,8 +56,8 @@ interface ICommentThreadTemplateData {
 }
 
 export class CommentsModelVirualDelegate implements IListVirtualDelegate<any> {
-	private static RESOURCE_ID = 'resource-with-comments';
-	private static COMMENT_ID = 'comment-node';
+	private static readonly RESOURCE_ID = 'resource-with-comments';
+	private static readonly COMMENT_ID = 'comment-node';
 
 
 	getHeight(element: any): number {

src/vs/workbench/contrib/debug/browser/debugActions.ts

@@ -56,7 +56,7 @@ export abstract class AbstractDebugAction extends Action {
 
 export class ConfigureAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.action.debug.configure';
-	static LABEL = nls.localize('openLaunchJson', "Open {0}", 'launch.json');
+	static readonly LABEL = nls.localize('openLaunchJson', "Open {0}", 'launch.json');
 
 	constructor(id: string, label: string,
 		@IDebugService debugService: IDebugService,
@@ -156,7 +156,7 @@ export class RunAction extends StartAction {
 
 export class SelectAndStartAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.action.debug.selectandstart';
-	static LABEL = nls.localize('selectAndStartDebugging', "Select and Start Debugging");
+	static readonly LABEL = nls.localize('selectAndStartDebugging', "Select and Start Debugging");
 
 	constructor(id: string, label: string,
 		@IDebugService debugService: IDebugService,
@@ -173,7 +173,7 @@ export class SelectAndStartAction extends AbstractDebugAction {
 
 export class RemoveBreakpointAction extends Action {
 	static readonly ID = 'workbench.debug.viewlet.action.removeBreakpoint';
-	static LABEL = nls.localize('removeBreakpoint', "Remove Breakpoint");
+	static readonly LABEL = nls.localize('removeBreakpoint', "Remove Breakpoint");
 
 	constructor(id: string, label: string, @IDebugService private readonly debugService: IDebugService) {
 		super(id, label, 'debug-action remove');
@@ -187,7 +187,7 @@ export class RemoveBreakpointAction extends Action {
 
 export class RemoveAllBreakpointsAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.debug.viewlet.action.removeAllBreakpoints';
-	static LABEL = nls.localize('removeAllBreakpoints', "Remove All Breakpoints");
+	static readonly LABEL = nls.localize('removeAllBreakpoints', "Remove All Breakpoints");
 
 	constructor(id: string, label: string, @IDebugService debugService: IDebugService, @IKeybindingService keybindingService: IKeybindingService) {
 		super(id, label, 'debug-action remove-all', debugService, keybindingService);
@@ -206,7 +206,7 @@ export class RemoveAllBreakpointsAction extends AbstractDebugAction {
 
 export class EnableAllBreakpointsAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.debug.viewlet.action.enableAllBreakpoints';
-	static LABEL = nls.localize('enableAllBreakpoints', "Enable All Breakpoints");
+	static readonly LABEL = nls.localize('enableAllBreakpoints', "Enable All Breakpoints");
 
 	constructor(id: string, label: string, @IDebugService debugService: IDebugService, @IKeybindingService keybindingService: IKeybindingService) {
 		super(id, label, 'debug-action enable-all-breakpoints', debugService, keybindingService);
@@ -225,7 +225,7 @@ export class EnableAllBreakpointsAction extends AbstractDebugAction {
 
 export class DisableAllBreakpointsAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.debug.viewlet.action.disableAllBreakpoints';
-	static LABEL = nls.localize('disableAllBreakpoints', "Disable All Breakpoints");
+	static readonly LABEL = nls.localize('disableAllBreakpoints', "Disable All Breakpoints");
 
 	constructor(id: string, label: string, @IDebugService debugService: IDebugService, @IKeybindingService keybindingService: IKeybindingService) {
 		super(id, label, 'debug-action disable-all-breakpoints', debugService, keybindingService);
@@ -244,8 +244,8 @@ export class DisableAllBreakpointsAction extends AbstractDebugAction {
 
 export class ToggleBreakpointsActivatedAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.debug.viewlet.action.toggleBreakpointsActivatedAction';
-	static ACTIVATE_LABEL = nls.localize('activateBreakpoints', "Activate Breakpoints");
-	static DEACTIVATE_LABEL = nls.localize('deactivateBreakpoints', "Deactivate Breakpoints");
+	static readonly ACTIVATE_LABEL = nls.localize('activateBreakpoints', "Activate Breakpoints");
+	static readonly DEACTIVATE_LABEL = nls.localize('deactivateBreakpoints', "Deactivate Breakpoints");
 
 	constructor(id: string, label: string, @IDebugService debugService: IDebugService, @IKeybindingService keybindingService: IKeybindingService) {
 		super(id, label, 'debug-action breakpoints-activate', debugService, keybindingService);
@@ -268,7 +268,7 @@ export class ToggleBreakpointsActivatedAction extends AbstractDebugAction {
 
 export class ReapplyBreakpointsAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.debug.viewlet.action.reapplyBreakpointsAction';
-	static LABEL = nls.localize('reapplyAllBreakpoints', "Reapply All Breakpoints");
+	static readonly LABEL = nls.localize('reapplyAllBreakpoints', "Reapply All Breakpoints");
 
 	constructor(id: string, label: string, @IDebugService debugService: IDebugService, @IKeybindingService keybindingService: IKeybindingService) {
 		super(id, label, '', debugService, keybindingService);
@@ -288,7 +288,7 @@ export class ReapplyBreakpointsAction extends AbstractDebugAction {
 
 export class AddFunctionBreakpointAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.debug.viewlet.action.addFunctionBreakpointAction';
-	static LABEL = nls.localize('addFunctionBreakpoint', "Add Function Breakpoint");
+	static readonly LABEL = nls.localize('addFunctionBreakpoint', "Add Function Breakpoint");
 
 	constructor(id: string, label: string, @IDebugService debugService: IDebugService, @IKeybindingService keybindingService: IKeybindingService) {
 		super(id, label, 'debug-action add-function-breakpoint', debugService, keybindingService);
@@ -308,7 +308,7 @@ export class AddFunctionBreakpointAction extends AbstractDebugAction {
 
 export class AddWatchExpressionAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.debug.viewlet.action.addWatchExpression';
-	static LABEL = nls.localize('addWatchExpression', "Add Expression");
+	static readonly LABEL = nls.localize('addWatchExpression', "Add Expression");
 
 	constructor(id: string, label: string, @IDebugService debugService: IDebugService, @IKeybindingService keybindingService: IKeybindingService) {
 		super(id, label, 'debug-action add-watch-expression', debugService, keybindingService);
@@ -329,7 +329,7 @@ export class AddWatchExpressionAction extends AbstractDebugAction {
 
 export class RemoveAllWatchExpressionsAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.debug.viewlet.action.removeAllWatchExpressions';
-	static LABEL = nls.localize('removeAllWatchExpressions', "Remove All Expressions");
+	static readonly LABEL = nls.localize('removeAllWatchExpressions', "Remove All Expressions");
 
 	constructor(id: string, label: string, @IDebugService debugService: IDebugService, @IKeybindingService keybindingService: IKeybindingService) {
 		super(id, label, 'debug-action remove-all', debugService, keybindingService);
@@ -348,7 +348,7 @@ export class RemoveAllWatchExpressionsAction extends AbstractDebugAction {
 
 export class FocusSessionAction extends AbstractDebugAction {
 	static readonly ID = 'workbench.action.debug.focusProcess';
-	static LABEL = nls.localize('focusSession', "Focus Session");
+	static readonly LABEL = nls.localize('focusSession', "Focus Session");
 
 	constructor(id: string, label: string,
 		@IDebugService debugService: IDebugService,
@@ -371,7 +371,7 @@ export class FocusSessionAction extends AbstractDebugAction {
 
 export class CopyValueAction extends Action {
 	static readonly ID = 'workbench.debug.viewlet.action.copyValue';
-	static LABEL = nls.localize('copyValue', "Copy Value");
+	static readonly LABEL = nls.localize('copyValue', "Copy Value");
 
 	constructor(
 		id: string, label: string, private value: any, private context: string,

src/vs/workbench/contrib/debug/browser/debugEditorActions.ts

@@ -104,8 +104,8 @@ class LogPointAction extends EditorAction {
 
 export class RunToCursorAction extends EditorAction {
 
-	public static ID = 'editor.debug.action.runToCursor';
-	public static LABEL = nls.localize('runToCursor', "Run to Cursor");
+	public static readonly ID = 'editor.debug.action.runToCursor';
+	public static readonly LABEL = nls.localize('runToCursor', "Run to Cursor");
 
 	constructor() {
 		super({

src/vs/workbench/contrib/debug/browser/debugHover.ts

@@ -174,7 +174,7 @@ export class DebugHoverWidget implements IContentWidget {
 		return this.doShow(pos, expression, focus);
 	}
 
-	private static _HOVER_HIGHLIGHT_DECORATION_OPTIONS = ModelDecorationOptions.register({
+	private static readonly _HOVER_HIGHLIGHT_DECORATION_OPTIONS = ModelDecorationOptions.register({
 		className: 'hoverHighlight'
 	});
 

src/vs/workbench/contrib/debug/browser/debugViewlet.ts

@@ -214,7 +214,7 @@ export class DebugViewlet extends ViewContainerViewlet {
 
 class ToggleReplAction extends TogglePanelAction {
 	static readonly ID = 'debug.toggleRepl';
-	static LABEL = nls.localize({ comment: ['Debug is a noun in this context, not a verb.'], key: 'debugConsoleAction' }, 'Debug Console');
+	static readonly LABEL = nls.localize({ comment: ['Debug is a noun in this context, not a verb.'], key: 'debugConsoleAction' }, 'Debug Console');
 
 	constructor(id: string, label: string,
 		@IWorkbenchLayoutService layoutService: IWorkbenchLayoutService,

src/vs/workbench/contrib/debug/browser/loadedScriptsView.ts

@@ -240,7 +240,7 @@ class RootTreeItem extends BaseTreeItem {
 
 class SessionTreeItem extends BaseTreeItem {
 
-	private static URL_REGEXP = /^(https?:\/\/[^/]+)(\/.*)$/;
+	private static readonly URL_REGEXP = /^(https?:\/\/[^/]+)(\/.*)$/;
 
 	private _session: IDebugSession;
 	private _initialized: boolean;

src/vs/workbench/contrib/debug/browser/repl.ts

@@ -982,7 +982,7 @@ class SelectReplActionViewItem extends FocusSessionActionViewItem {
 class SelectReplAction extends Action {
 
 	static readonly ID = 'workbench.action.debug.selectRepl';
-	static LABEL = nls.localize('selectRepl', "Select Debug Console");
+	static readonly LABEL = nls.localize('selectRepl', "Select Debug Console");
 
 	constructor(id: string, label: string,
 		@IDebugService private readonly debugService: IDebugService,
@@ -1005,7 +1005,7 @@ class SelectReplAction extends Action {
 
 export class ClearReplAction extends Action {
 	static readonly ID = 'workbench.debug.panel.action.clearReplAction';
-	static LABEL = nls.localize('clearRepl', "Clear Console");
+	static readonly LABEL = nls.localize('clearRepl', "Clear Console");
 
 	constructor(id: string, label: string,
 		@IPanelService private readonly panelService: IPanelService

src/vs/workbench/contrib/debug/common/debugModel.ts

@@ -27,7 +27,7 @@ import { mixin } from 'vs/base/common/objects';
 
 export class ExpressionContainer implements IExpressionContainer {
 
-	public static allValues = new Map<string, string>();
+	public static readonly allValues = new Map<string, string>();
 	// Use chunks to support variable paging #9537
 	private static readonly BASE_CHUNK_SIZE = 100;
 
@@ -172,7 +172,7 @@ export class ExpressionContainer implements IExpressionContainer {
 }
 
 export class Expression extends ExpressionContainer implements IExpression {
-	static DEFAULT_VALUE = nls.localize('notAvailable', "not available");
+	static readonly DEFAULT_VALUE = nls.localize('notAvailable', "not available");
 
 	public available: boolean;
 

src/vs/workbench/contrib/extensions/browser/extensionsActions.ts

@@ -143,8 +143,8 @@ export abstract class ExtensionAction extends Action implements IExtensionContai
 
 export class InstallAction extends ExtensionAction {
 
-	private static INSTALL_LABEL = localize('install', "Install");
-	private static INSTALLING_LABEL = localize('installing', "Installing");
+	private static readonly INSTALL_LABEL = localize('install', "Install");
+	private static readonly INSTALLING_LABEL = localize('installing', "Installing");
 
 	private static readonly Class = 'extension-action prominent install';
 	private static readonly InstallingClass = 'extension-action install installing';
@@ -277,8 +277,8 @@ export class InstallAction extends ExtensionAction {
 
 export abstract class InstallInOtherServerAction extends ExtensionAction {
 
-	protected static INSTALL_LABEL = localize('install', "Install");
-	protected static INSTALLING_LABEL = localize('installing', "Installing");
+	protected static readonly INSTALL_LABEL = localize('install', "Install");
+	protected static readonly INSTALLING_LABEL = localize('installing', "Installing");
 
 	private static readonly Class = 'extension-action prominent install';
 	private static readonly InstallingClass = 'extension-action install installing';
@@ -726,7 +726,7 @@ export class ManageExtensionAction extends ExtensionDropDownAction {
 export class InstallAnotherVersionAction extends ExtensionAction {
 
 	static readonly ID = 'workbench.extensions.action.install.anotherVersion';
-	static LABEL = localize('install another version', "Install Another Version...");
+	static readonly LABEL = localize('install another version', "Install Another Version...");
 
 	constructor(
 		@IExtensionsWorkbenchService private readonly extensionsWorkbenchService: IExtensionsWorkbenchService,
@@ -832,7 +832,7 @@ export class ExtensionSettingsAction extends ExtensionAction {
 export class EnableForWorkspaceAction extends ExtensionAction {
 
 	static readonly ID = 'extensions.enableForWorkspace';
-	static LABEL = localize('enableForWorkspaceAction', "Enable (Workspace)");
+	static readonly LABEL = localize('enableForWorkspaceAction', "Enable (Workspace)");
 
 	constructor(
 		@IExtensionsWorkbenchService private readonly extensionsWorkbenchService: IExtensionsWorkbenchService,
@@ -859,7 +859,7 @@ export class EnableForWorkspaceAction extends ExtensionAction {
 export class EnableGloballyAction extends ExtensionAction {
 
 	static readonly ID = 'extensions.enableGlobally';
-	static LABEL = localize('enableGloballyAction', "Enable");
+	static readonly LABEL = localize('enableGloballyAction', "Enable");
 
 	constructor(
 		@IExtensionsWorkbenchService private readonly extensionsWorkbenchService: IExtensionsWorkbenchService,
@@ -886,7 +886,7 @@ export class EnableGloballyAction extends ExtensionAction {
 export class DisableForWorkspaceAction extends ExtensionAction {
 
 	static readonly ID = 'extensions.disableForWorkspace';
-	static LABEL = localize('disableForWorkspaceAction', "Disable (Workspace)");
+	static readonly LABEL = localize('disableForWorkspaceAction', "Disable (Workspace)");
 
 	constructor(readonly runningExtensions: IExtensionDescription[],
 		@IWorkspaceContextService private readonly workspaceContextService: IWorkspaceContextService,
@@ -914,7 +914,7 @@ export class DisableForWorkspaceAction extends ExtensionAction {
 export class DisableGloballyAction extends ExtensionAction {
 
 	static readonly ID = 'extensions.disableGlobally';
-	static LABEL = localize('disableGloballyAction', "Disable");
+	static readonly LABEL = localize('disableGloballyAction', "Disable");
 
 	constructor(readonly runningExtensions: IExtensionDescription[],
 		@IExtensionsWorkbenchService private readonly extensionsWorkbenchService: IExtensionsWorkbenchService,
@@ -1010,7 +1010,7 @@ export class DisableDropDownAction extends ExtensionEditorDropDownAction {
 export class CheckForUpdatesAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.checkForUpdates';
-	static LABEL = localize('checkForUpdates', "Check for Extension Updates");
+	static readonly LABEL = localize('checkForUpdates', "Check for Extension Updates");
 
 	constructor(
 		id = CheckForUpdatesAction.ID,
@@ -1082,7 +1082,7 @@ export class ToggleAutoUpdateAction extends Action {
 export class EnableAutoUpdateAction extends ToggleAutoUpdateAction {
 
 	static readonly ID = 'workbench.extensions.action.enableAutoUpdate';
-	static LABEL = localize('enableAutoUpdate', "Enable Auto Updating Extensions");
+	static readonly LABEL = localize('enableAutoUpdate', "Enable Auto Updating Extensions");
 
 	constructor(
 		id = EnableAutoUpdateAction.ID,
@@ -1096,7 +1096,7 @@ export class EnableAutoUpdateAction extends ToggleAutoUpdateAction {
 export class DisableAutoUpdateAction extends ToggleAutoUpdateAction {
 
 	static readonly ID = 'workbench.extensions.action.disableAutoUpdate';
-	static LABEL = localize('disableAutoUpdate', "Disable Auto Updating Extensions");
+	static readonly LABEL = localize('disableAutoUpdate', "Disable Auto Updating Extensions");
 
 	constructor(
 		id = EnableAutoUpdateAction.ID,
@@ -1110,7 +1110,7 @@ export class DisableAutoUpdateAction extends ToggleAutoUpdateAction {
 export class UpdateAllAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.updateAllExtensions';
-	static LABEL = localize('updateAll', "Update All Extensions");
+	static readonly LABEL = localize('updateAll', "Update All Extensions");
 
 	constructor(
 		id = UpdateAllAction.ID,
@@ -1417,7 +1417,7 @@ export class InstallExtensionsAction extends OpenExtensionsViewletAction {
 export class ShowEnabledExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.showEnabledExtensions';
-	static LABEL = localize('showEnabledExtensions', "Show Enabled Extensions");
+	static readonly LABEL = localize('showEnabledExtensions', "Show Enabled Extensions");
 
 	constructor(
 		id: string,
@@ -1440,7 +1440,7 @@ export class ShowEnabledExtensionsAction extends Action {
 export class ShowInstalledExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.showInstalledExtensions';
-	static LABEL = localize('showInstalledExtensions', "Show Installed Extensions");
+	static readonly LABEL = localize('showInstalledExtensions', "Show Installed Extensions");
 
 	constructor(
 		id: string,
@@ -1463,7 +1463,7 @@ export class ShowInstalledExtensionsAction extends Action {
 export class ShowDisabledExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.showDisabledExtensions';
-	static LABEL = localize('showDisabledExtensions', "Show Disabled Extensions");
+	static readonly LABEL = localize('showDisabledExtensions', "Show Disabled Extensions");
 
 	constructor(
 		id: string,
@@ -1486,7 +1486,7 @@ export class ShowDisabledExtensionsAction extends Action {
 export class ClearExtensionsInputAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.clearExtensionsInput';
-	static LABEL = localize('clearExtensionsInput', "Clear Extensions Input");
+	static readonly LABEL = localize('clearExtensionsInput', "Clear Extensions Input");
 
 	constructor(
 		id: string,
@@ -1517,7 +1517,7 @@ export class ClearExtensionsInputAction extends Action {
 export class ShowBuiltInExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.listBuiltInExtensions';
-	static LABEL = localize('showBuiltInExtensions', "Show Built-in Extensions");
+	static readonly LABEL = localize('showBuiltInExtensions', "Show Built-in Extensions");
 
 	constructor(
 		id: string,
@@ -1540,7 +1540,7 @@ export class ShowBuiltInExtensionsAction extends Action {
 export class ShowOutdatedExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.listOutdatedExtensions';
-	static LABEL = localize('showOutdatedExtensions', "Show Outdated Extensions");
+	static readonly LABEL = localize('showOutdatedExtensions', "Show Outdated Extensions");
 
 	constructor(
 		id: string,
@@ -1563,7 +1563,7 @@ export class ShowOutdatedExtensionsAction extends Action {
 export class ShowPopularExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.showPopularExtensions';
-	static LABEL = localize('showPopularExtensions', "Show Popular Extensions");
+	static readonly LABEL = localize('showPopularExtensions', "Show Popular Extensions");
 
 	constructor(
 		id: string,
@@ -1586,7 +1586,7 @@ export class ShowPopularExtensionsAction extends Action {
 export class ShowRecommendedExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.showRecommendedExtensions';
-	static LABEL = localize('showRecommendedExtensions', "Show Recommended Extensions");
+	static readonly LABEL = localize('showRecommendedExtensions', "Show Recommended Extensions");
 
 	constructor(
 		id: string,
@@ -1609,7 +1609,7 @@ export class ShowRecommendedExtensionsAction extends Action {
 export class InstallWorkspaceRecommendedExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.installWorkspaceRecommendedExtensions';
-	static LABEL = localize('installWorkspaceRecommendedExtensions', "Install All Workspace Recommended Extensions");
+	static readonly LABEL = localize('installWorkspaceRecommendedExtensions', "Install All Workspace Recommended Extensions");
 
 	private _recommendations: IExtensionRecommendation[] = [];
 	get recommendations(): IExtensionRecommendation[] { return this._recommendations; }
@@ -1674,7 +1674,7 @@ export class InstallWorkspaceRecommendedExtensionsAction extends Action {
 export class InstallRecommendedExtensionAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.installRecommendedExtension';
-	static LABEL = localize('installRecommendedExtension', "Install Recommended Extension");
+	static readonly LABEL = localize('installRecommendedExtension', "Install Recommended Extension");
 
 	private extensionId: string;
 
@@ -1765,7 +1765,7 @@ export class UndoIgnoreExtensionRecommendationAction extends Action {
 export class ShowRecommendedKeymapExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.showRecommendedKeymapExtensions';
-	static SHORT_LABEL = localize('showRecommendedKeymapExtensionsShort', "Keymaps");
+	static readonly SHORT_LABEL = localize('showRecommendedKeymapExtensionsShort', "Keymaps");
 
 	constructor(
 		id: string,
@@ -1788,7 +1788,7 @@ export class ShowRecommendedKeymapExtensionsAction extends Action {
 export class ShowLanguageExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.showLanguageExtensions';
-	static SHORT_LABEL = localize('showLanguageExtensionsShort', "Language Extensions");
+	static readonly SHORT_LABEL = localize('showLanguageExtensionsShort', "Language Extensions");
 
 	constructor(
 		id: string,
@@ -1811,7 +1811,7 @@ export class ShowLanguageExtensionsAction extends Action {
 export class ShowAzureExtensionsAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.showAzureExtensions';
-	static SHORT_LABEL = localize('showAzureExtensionsShort', "Azure Extensions");
+	static readonly SHORT_LABEL = localize('showAzureExtensionsShort', "Azure Extensions");
 
 	constructor(
 		id: string,
@@ -2153,7 +2153,7 @@ export abstract class AbstractConfigureRecommendedExtensionsAction extends Actio
 export class ConfigureWorkspaceRecommendedExtensionsAction extends AbstractConfigureRecommendedExtensionsAction {
 
 	static readonly ID = 'workbench.extensions.action.configureWorkspaceRecommendedExtensions';
-	static LABEL = localize('configureWorkspaceRecommendedExtensions', "Configure Recommended Extensions (Workspace)");
+	static readonly LABEL = localize('configureWorkspaceRecommendedExtensions', "Configure Recommended Extensions (Workspace)");
 
 
 	constructor(
@@ -2189,7 +2189,7 @@ export class ConfigureWorkspaceRecommendedExtensionsAction extends AbstractConfi
 export class ConfigureWorkspaceFolderRecommendedExtensionsAction extends AbstractConfigureRecommendedExtensionsAction {
 
 	static readonly ID = 'workbench.extensions.action.configureWorkspaceFolderRecommendedExtensions';
-	static LABEL = localize('configureWorkspaceFolderRecommendedExtensions', "Configure Recommended Extensions (Workspace Folder)");
+	static readonly LABEL = localize('configureWorkspaceFolderRecommendedExtensions', "Configure Recommended Extensions (Workspace Folder)");
 
 
 	constructor(
@@ -2662,7 +2662,7 @@ export class SystemDisabledWarningAction extends ExtensionAction {
 export class DisableAllAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.disableAll';
-	static LABEL = localize('disableAll', "Disable All Installed Extensions");
+	static readonly LABEL = localize('disableAll', "Disable All Installed Extensions");
 
 
 	constructor(
@@ -2687,7 +2687,7 @@ export class DisableAllAction extends Action {
 export class DisableAllWorkspaceAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.disableAllWorkspace';
-	static LABEL = localize('disableAllWorkspace', "Disable All Installed Extensions for this Workspace");
+	static readonly LABEL = localize('disableAllWorkspace', "Disable All Installed Extensions for this Workspace");
 
 
 	constructor(
@@ -2714,7 +2714,7 @@ export class DisableAllWorkspaceAction extends Action {
 export class EnableAllAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.enableAll';
-	static LABEL = localize('enableAll', "Enable All Extensions");
+	static readonly LABEL = localize('enableAll', "Enable All Extensions");
 
 
 	constructor(
@@ -2739,7 +2739,7 @@ export class EnableAllAction extends Action {
 export class EnableAllWorkspaceAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.enableAllWorkspace';
-	static LABEL = localize('enableAllWorkspace', "Enable All Extensions for this Workspace");
+	static readonly LABEL = localize('enableAllWorkspace', "Enable All Extensions for this Workspace");
 
 
 	constructor(
@@ -2766,7 +2766,7 @@ export class EnableAllWorkspaceAction extends Action {
 export class InstallVSIXAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.installVSIX';
-	static LABEL = localize('installVSIX', "Install from VSIX...");
+	static readonly LABEL = localize('installVSIX', "Install from VSIX...");
 
 	constructor(
 		id = InstallVSIXAction.ID,
@@ -2818,7 +2818,7 @@ export class InstallVSIXAction extends Action {
 export class ReinstallAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.reinstall';
-	static LABEL = localize('reinstall', "Reinstall Extension...");
+	static readonly LABEL = localize('reinstall', "Reinstall Extension...");
 
 	constructor(
 		id: string = ReinstallAction.ID, label: string = ReinstallAction.LABEL,
@@ -2884,7 +2884,7 @@ export class ReinstallAction extends Action {
 export class InstallSpecificVersionOfExtensionAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.install.specificVersion';
-	static LABEL = localize('install previous version', "Install Specific Version of Extension...");
+	static readonly LABEL = localize('install previous version', "Install Specific Version of Extension...");
 
 	constructor(
 		id: string = InstallSpecificVersionOfExtensionAction.ID, label: string = InstallSpecificVersionOfExtensionAction.LABEL,

src/vs/workbench/contrib/extensions/electron-browser/extensionsActions.ts

@@ -14,7 +14,7 @@ import { Schemas } from 'vs/base/common/network';
 export class OpenExtensionsFolderAction extends Action {
 
 	static readonly ID = 'workbench.extensions.action.openExtensionsFolder';
-	static LABEL = localize('openExtensionsFolder', "Open Extensions Folder");
+	static readonly LABEL = localize('openExtensionsFolder', "Open Extensions Folder");
 
 	constructor(
 		id: string,

src/vs/workbench/contrib/extensions/electron-browser/runtimeExtensionsEditor.ts

@@ -459,7 +459,7 @@ export class RuntimeExtensionsEditor extends BaseEditor {
 
 export class ShowRuntimeExtensionsAction extends Action {
 	static readonly ID = 'workbench.action.showRuntimeExtensions';
-	static LABEL = nls.localize('showRuntimeExtensions', "Show Running Extensions");
+	static readonly LABEL = nls.localize('showRuntimeExtensions', "Show Running Extensions");
 
 	constructor(
 		id: string, label: string,
@@ -477,7 +477,7 @@ export class ShowRuntimeExtensionsAction extends Action {
 export class ReportExtensionIssueAction extends Action {
 
 	private static readonly _id = 'workbench.extensions.action.reportExtensionIssue';
-	private static _label = nls.localize('reportExtensionIssue', "Report Issue");
+	private static readonly _label = nls.localize('reportExtensionIssue', "Report Issue");
 
 	private readonly _url: string;
 
@@ -533,8 +533,8 @@ export class ReportExtensionIssueAction extends Action {
 
 export class DebugExtensionHostAction extends Action {
 	static readonly ID = 'workbench.extensions.action.debugExtensionHost';
-	static LABEL = nls.localize('debugExtensionHost', "Start Debugging Extension Host");
-	static CSS_CLASS = 'debug-extension-host';
+	static readonly LABEL = nls.localize('debugExtensionHost', "Start Debugging Extension Host");
+	static readonly CSS_CLASS = 'debug-extension-host';
 
 	constructor(
 		@IDebugService private readonly _debugService: IDebugService,
@@ -572,7 +572,7 @@ export class DebugExtensionHostAction extends Action {
 
 export class StartExtensionHostProfileAction extends Action {
 	static readonly ID = 'workbench.extensions.action.extensionHostProfile';
-	static LABEL = nls.localize('extensionHostProfileStart', "Start Extension Host Profile");
+	static readonly LABEL = nls.localize('extensionHostProfileStart', "Start Extension Host Profile");
 
 	constructor(
 		id: string = StartExtensionHostProfileAction.ID, label: string = StartExtensionHostProfileAction.LABEL,
@@ -589,7 +589,7 @@ export class StartExtensionHostProfileAction extends Action {
 
 export class StopExtensionHostProfileAction extends Action {
 	static readonly ID = 'workbench.extensions.action.stopExtensionHostProfile';
-	static LABEL = nls.localize('stopExtensionHostProfileStart', "Stop Extension Host Profile");
+	static readonly LABEL = nls.localize('stopExtensionHostProfileStart', "Stop Extension Host Profile");
 
 	constructor(
 		id: string = StartExtensionHostProfileAction.ID, label: string = StartExtensionHostProfileAction.LABEL,
@@ -606,7 +606,7 @@ export class StopExtensionHostProfileAction extends Action {
 
 export class SaveExtensionHostProfileAction extends Action {
 
-	static LABEL = nls.localize('saveExtensionHostProfile', "Save Extension Host Profile");
+	static readonly LABEL = nls.localize('saveExtensionHostProfile', "Save Extension Host Profile");
 	static readonly ID = 'workbench.extensions.action.saveExtensionHostProfile';
 
 	constructor(

src/vs/workbench/contrib/files/browser/views/openEditorsView.ts

@@ -49,7 +49,7 @@ export class OpenEditorsView extends ViewletPanel {
 
 	private static readonly DEFAULT_VISIBLE_OPEN_EDITORS = 9;
 	static readonly ID = 'workbench.explorer.openEditorsView';
-	static NAME = nls.localize({ key: 'openEditors', comment: ['Open is an adjective'] }, "Open Editors");
+	static readonly NAME = nls.localize({ key: 'openEditors', comment: ['Open is an adjective'] }, "Open Editors");
 
 	private dirtyCountElement!: HTMLElement;
 	private listRefreshScheduler: RunOnceScheduler;

src/vs/workbench/contrib/format/browser/formatActionsMultiple.ts

@@ -33,7 +33,7 @@ type FormattingEditProvider = DocumentFormattingEditProvider | DocumentRangeForm
 
 class DefaultFormatter extends Disposable implements IWorkbenchContribution {
 
-	static configName = 'editor.defaultFormatter';
+	static readonly configName = 'editor.defaultFormatter';
 
 	static extensionIds: (string | null)[] = [];
 	static extensionDescriptions: string[] = [];

src/vs/workbench/contrib/logs/common/logsActions.ts

@@ -15,8 +15,8 @@ import { IEditorService } from 'vs/workbench/services/editor/common/editorServic
 
 export class SetLogLevelAction extends Action {
 
-	static ID = 'workbench.action.setLogLevel';
-	static LABEL = nls.localize('setLogLevel', "Set Log Level...");
+	static readonly ID = 'workbench.action.setLogLevel';
+	static readonly LABEL = nls.localize('setLogLevel', "Set Log Level...");
 
 	constructor(id: string, label: string,
 		@IQuickInputService private readonly quickInputService: IQuickInputService,
@@ -60,8 +60,8 @@ export class SetLogLevelAction extends Action {
 
 export class OpenWindowSessionLogFileAction extends Action {
 
-	static ID = 'workbench.action.openSessionLogFile';
-	static LABEL = nls.localize('openSessionLogFile', "Open Window Log File (Session)...");
+	static readonly ID = 'workbench.action.openSessionLogFile';
+	static readonly LABEL = nls.localize('openSessionLogFile', "Open Window Log File (Session)...");
 
 	constructor(id: string, label: string,
 		@IWorkbenchEnvironmentService private readonly environmentService: IWorkbenchEnvironmentService,

src/vs/workbench/contrib/logs/electron-browser/logsActions.ts

@@ -12,8 +12,8 @@ import { IElectronService } from 'vs/platform/electron/node/electron';
 
 export class OpenLogsFolderAction extends Action {
 
-	static ID = 'workbench.action.openLogsFolder';
-	static LABEL = nls.localize('openLogsFolder', "Open Logs Folder");
+	static readonly ID = 'workbench.action.openLogsFolder';
+	static readonly LABEL = nls.localize('openLogsFolder', "Open Logs Folder");
 
 	constructor(id: string, label: string,
 		@IEnvironmentService private readonly environmentService: IEnvironmentService,

src/vs/workbench/contrib/output/browser/outputActions.ts

@@ -213,8 +213,8 @@ export class OpenLogOutputFile extends Action {
 
 export class ShowLogsOutputChannelAction extends Action {
 
-	static ID = 'workbench.action.showLogs';
-	static LABEL = nls.localize('showLogs', "Show Logs...");
+	static readonly ID = 'workbench.action.showLogs';
+	static readonly LABEL = nls.localize('showLogs', "Show Logs...");
 
 	constructor(id: string, label: string,
 		@IQuickInputService private readonly quickInputService: IQuickInputService,
@@ -243,8 +243,8 @@ interface IOutputChannelQuickPickItem extends IQuickPickItem {
 
 export class OpenOutputLogFileAction extends Action {
 
-	static ID = 'workbench.action.openLogFile';
-	static LABEL = nls.localize('openLogFile', "Open Log File...");
+	static readonly ID = 'workbench.action.openLogFile';
+	static readonly LABEL = nls.localize('openLogFile', "Open Log File...");
 
 	constructor(id: string, label: string,
 		@IQuickInputService private readonly quickInputService: IQuickInputService,

src/vs/workbench/contrib/preferences/browser/settingsTreeModels.ts

@@ -90,7 +90,7 @@ export class SettingsTreeNewExtensionsElement extends SettingsTreeElement {
 }
 
 export class SettingsTreeSettingElement extends SettingsTreeElement {
-	private static MAX_DESC_LINES = 20;
+	private static readonly MAX_DESC_LINES = 20;
 
 	setting: ISetting;
 

src/vs/workbench/contrib/remote/browser/remote.ts

@@ -468,7 +468,7 @@ Registry.as<ViewletRegistry>(ViewletExtensions.Viewlets).registerViewlet(new Vie
 class OpenRemoteViewletAction extends ShowViewletAction {
 
 	static readonly ID = VIEWLET_ID;
-	static LABEL = nls.localize('toggleRemoteViewlet', "Show Remote Explorer");
+	static readonly LABEL = nls.localize('toggleRemoteViewlet', "Show Remote Explorer");
 
 	constructor(id: string, label: string, @IViewletService viewletService: IViewletService, @IEditorGroupsService editorGroupService: IEditorGroupsService, @IWorkbenchLayoutService layoutService: IWorkbenchLayoutService) {
 		super(id, label, VIEWLET_ID, viewletService, editorGroupService, layoutService);

src/vs/workbench/contrib/scm/browser/repositoryPanel.ts

@@ -64,7 +64,7 @@ interface ResourceGroupTemplate {
 
 class ResourceGroupRenderer implements ICompressibleTreeRenderer<ISCMResourceGroup, FuzzyScore, ResourceGroupTemplate> {
 
-	static TEMPLATE_ID = 'resource group';
+	static readonly TEMPLATE_ID = 'resource group';
 	get templateId(): string { return ResourceGroupRenderer.TEMPLATE_ID; }
 
 	constructor(
@@ -150,7 +150,7 @@ class MultipleSelectionActionRunner extends ActionRunner {
 
 class ResourceRenderer implements ICompressibleTreeRenderer<ISCMResource | IBranchNode<ISCMResource, ISCMResourceGroup>, FuzzyScore, ResourceTemplate> {
 
-	static TEMPLATE_ID = 'resource';
+	static readonly TEMPLATE_ID = 'resource';
 	get templateId(): string { return ResourceRenderer.TEMPLATE_ID; }
 
 	constructor(

src/vs/workbench/contrib/scm/browser/scm.contribution.ts

@@ -28,7 +28,7 @@ import { SCMService } from 'vs/workbench/contrib/scm/common/scmService';
 class OpenSCMViewletAction extends ShowViewletAction {
 
 	static readonly ID = VIEWLET_ID;
-	static LABEL = localize('toggleGitViewlet', "Show Git");
+	static readonly LABEL = localize('toggleGitViewlet', "Show Git");
 
 	constructor(id: string, label: string, @IViewletService viewletService: IViewletService, @IEditorGroupsService editorGroupService: IEditorGroupsService, @IWorkbenchLayoutService layoutService: IWorkbenchLayoutService) {
 		super(id, label, VIEWLET_ID, viewletService, editorGroupService, layoutService);

src/vs/workbench/contrib/search/browser/searchActions.ts

@@ -494,7 +494,7 @@ export abstract class AbstractSearchAndReplaceAction extends Action {
 
 export class RemoveAction extends AbstractSearchAndReplaceAction {
 
-	static LABEL = nls.localize('RemoveAction.label', "Dismiss");
+	static readonly LABEL = nls.localize('RemoveAction.label', "Dismiss");
 
 	constructor(
 		private viewer: WorkbenchObjectTree<RenderableMatch>,

src/vs/workbench/contrib/snippets/browser/tabCompletion.ts

@@ -24,7 +24,7 @@ import { EditorOption } from 'vs/editor/common/config/editorOptions';
 export class TabCompletionController implements editorCommon.IEditorContribution {
 
 	private static readonly ID = 'editor.tabCompletionController';
-	static ContextKey = new RawContextKey<boolean>('hasSnippetCompletions', undefined);
+	static readonly ContextKey = new RawContextKey<boolean>('hasSnippetCompletions', undefined);
 
 	public static get(editor: ICodeEditor): TabCompletionController {
 		return editor.getContribution<TabCompletionController>(TabCompletionController.ID);

src/vs/workbench/contrib/tasks/browser/terminalTaskSystem.ts

@@ -113,7 +113,7 @@ export class TerminalTaskSystem implements ITaskSystem {
 
 	public static TelemetryEventName: string = 'taskService';
 
-	private static ProcessVarName = '__process__';
+	private static readonly ProcessVarName = '__process__';
 
 	private static shellQuotes: IStringDictionary<ShellQuotingOptions> = {
 		'cmd': {

src/vs/workbench/contrib/themes/browser/themes.contribution.ts

@@ -27,7 +27,7 @@ import { IQuickInputService, QuickPickInput } from 'vs/platform/quickinput/commo
 export class SelectColorThemeAction extends Action {
 
 	static readonly ID = 'workbench.action.selectTheme';
-	static LABEL = localize('selectTheme.label', "Color Theme");
+	static readonly LABEL = localize('selectTheme.label', "Color Theme");
 
 	constructor(
 		id: string,
@@ -90,7 +90,7 @@ export class SelectColorThemeAction extends Action {
 class SelectIconThemeAction extends Action {
 
 	static readonly ID = 'workbench.action.selectIconTheme';
-	static LABEL = localize('selectIconTheme.label', "File Icon Theme");
+	static readonly LABEL = localize('selectIconTheme.label', "File Icon Theme");
 
 	constructor(
 		id: string,
@@ -197,7 +197,7 @@ function toEntries(themes: Array<IColorTheme | IFileIconTheme>, label?: string):
 class GenerateColorThemeAction extends Action {
 
 	static readonly ID = 'workbench.action.generateColorTheme';
-	static LABEL = localize('generateColorTheme.label', "Generate Color Theme From Current Settings");
+	static readonly LABEL = localize('generateColorTheme.label', "Generate Color Theme From Current Settings");
 
 	constructor(
 		id: string,
@@ -288,4 +288,4 @@ MenuRegistry.appendMenuItem(MenuId.GlobalActivity, {
 		title: localize('themes.selectIconTheme.label', "File Icon Theme")
 	},
 	order: 2
-});
+});

src/vs/workbench/contrib/update/browser/update.ts

@@ -103,7 +103,7 @@ export class ShowReleaseNotesAction extends AbstractShowReleaseNotesAction {
 export class ShowCurrentReleaseNotesAction extends AbstractShowReleaseNotesAction {
 
 	static readonly ID = ShowCurrentReleaseNotesActionId;
-	static LABEL = nls.localize('showReleaseNotes', "Show Release Notes");
+	static readonly LABEL = nls.localize('showReleaseNotes', "Show Release Notes");
 
 	constructor(
 		id = ShowCurrentReleaseNotesAction.ID,

src/vs/workbench/contrib/webview/browser/webviewEditor.ts

@@ -21,7 +21,7 @@ import { IEditorService } from 'vs/workbench/services/editor/common/editorServic
 
 export class WebviewEditor extends BaseEditor {
 
-	public static ID = 'WebviewEditor';
+	public static readonly ID = 'WebviewEditor';
 
 	private readonly _scopedContextKeyService = this._register(new MutableDisposable<IContextKeyService>());
 	private _findWidgetVisible: IContextKey<boolean>;

src/vs/workbench/contrib/welcome/telemetryOptOut/browser/telemetryOptOut.ts

@@ -20,7 +20,7 @@ import { IHostService } from 'vs/workbench/services/host/browser/host';
 
 export abstract class AbstractTelemetryOptOut implements IWorkbenchContribution {
 
-	private static TELEMETRY_OPT_OUT_SHOWN = 'workbench.telemetryOptOutShown';
+	private static readonly TELEMETRY_OPT_OUT_SHOWN = 'workbench.telemetryOptOutShown';
 	private privacyUrl: string | undefined;
 
 	constructor(

src/vs/workbench/electron-browser/actions/developerActions.ts

@@ -11,7 +11,7 @@ import { ISharedProcessService } from 'vs/platform/ipc/electron-browser/sharedPr
 export class ToggleDevToolsAction extends Action {
 
 	static readonly ID = 'workbench.action.toggleDevTools';
-	static LABEL = nls.localize('toggleDevTools', "Toggle Developer Tools");
+	static readonly LABEL = nls.localize('toggleDevTools', "Toggle Developer Tools");
 
 	constructor(id: string, label: string, @IElectronService private readonly electronService: IElectronService) {
 		super(id, label);
@@ -25,7 +25,7 @@ export class ToggleDevToolsAction extends Action {
 export class ToggleSharedProcessAction extends Action {
 
 	static readonly ID = 'workbench.action.toggleSharedProcess';
-	static LABEL = nls.localize('toggleSharedProcess', "Toggle Shared Process");
+	static readonly LABEL = nls.localize('toggleSharedProcess', "Toggle Shared Process");
 
 	constructor(id: string, label: string, @ISharedProcessService private readonly sharedProcessService: ISharedProcessService) {
 		super(id, label);

src/vs/workbench/electron-browser/actions/windowActions.ts

@@ -140,7 +140,7 @@ export class ZoomResetAction extends BaseZoomAction {
 export class ReloadWindowWithExtensionsDisabledAction extends Action {
 
 	static readonly ID = 'workbench.action.reloadWindowWithExtensionsDisabled';
-	static LABEL = nls.localize('reloadWindowWithExtensionsDisabled', "Reload With Extensions Disabled");
+	static readonly LABEL = nls.localize('reloadWindowWithExtensionsDisabled', "Reload With Extensions Disabled");
 
 	constructor(
 		id: string,
@@ -217,7 +217,7 @@ export abstract class BaseSwitchWindow extends Action {
 export class SwitchWindow extends BaseSwitchWindow {
 
 	static readonly ID = 'workbench.action.switchWindow';
-	static LABEL = nls.localize('switchWindow', "Switch Window...");
+	static readonly LABEL = nls.localize('switchWindow', "Switch Window...");
 
 	constructor(
 		id: string,
@@ -240,7 +240,7 @@ export class SwitchWindow extends BaseSwitchWindow {
 export class QuickSwitchWindow extends BaseSwitchWindow {
 
 	static readonly ID = 'workbench.action.quickSwitchWindow';
-	static LABEL = nls.localize('quickSwitchWindow', "Quick Switch Window...");
+	static readonly LABEL = nls.localize('quickSwitchWindow', "Quick Switch Window...");
 
 	constructor(
 		id: string,

src/vs/workbench/electron-browser/actions/workspaceActions.ts

@@ -14,7 +14,7 @@ import { IWorkbenchEnvironmentService } from 'vs/workbench/services/environment/
 export class SaveWorkspaceAsAction extends Action {
 
 	static readonly ID = 'workbench.action.saveWorkspaceAs';
-	static LABEL = nls.localize('saveWorkspaceAsAction', "Save Workspace As...");
+	static readonly LABEL = nls.localize('saveWorkspaceAsAction', "Save Workspace As...");
 
 	constructor(
 		id: string,

src/vs/workbench/services/clipboard/electron-browser/clipboardService.ts

@@ -11,7 +11,7 @@ import { registerSingleton } from 'vs/platform/instantiation/common/extensions';
 
 export class NativeClipboardService implements IClipboardService {
 
-	private static FILE_FORMAT = 'code/file-list'; // Clipboard format for files
+	private static readonly FILE_FORMAT = 'code/file-list'; // Clipboard format for files
 
 	_serviceBrand: undefined;
 

src/vs/workbench/services/configurationResolver/browser/configurationResolverService.ts

@@ -25,7 +25,7 @@ import { registerSingleton } from 'vs/platform/instantiation/common/extensions';
 
 export abstract class BaseConfigurationResolverService extends AbstractVariableResolverService {
 
-	static INPUT_OR_COMMAND_VARIABLES_PATTERN = /\${((input|command):(.*?))}/g;
+	static readonly INPUT_OR_COMMAND_VARIABLES_PATTERN = /\${((input|command):(.*?))}/g;
 
 	constructor(
 		envVariables: IProcessEnvironment,

src/vs/workbench/services/configurationResolver/common/variableResolver.ts

@@ -27,8 +27,8 @@ export interface IVariableResolveContext {
 
 export class AbstractVariableResolverService implements IConfigurationResolverService {
 
-	static VARIABLE_REGEXP = /\$\{(.*?)\}/g;
-	static VARIABLE_REGEXP_SINGLE = /\$\{(.*?)\}/;
+	static readonly VARIABLE_REGEXP = /\$\{(.*?)\}/g;
+	static readonly VARIABLE_REGEXP_SINGLE = /\$\{(.*?)\}/;
 
 	_serviceBrand: undefined;
 

src/vs/workbench/services/extensions/common/rpcProtocol.ts

@@ -58,7 +58,7 @@ const noop = () => { };
 
 export class RPCProtocol extends Disposable implements IRPCProtocol {
 
-	private static UNRESPONSIVE_TIME = 3 * 1000; // 3s
+	private static readonly UNRESPONSIVE_TIME = 3 * 1000; // 3s
 
 	private readonly _onDidChangeResponsiveState: Emitter<ResponsiveState> = this._register(new Emitter<ResponsiveState>());
 	public readonly onDidChangeResponsiveState: Event<ResponsiveState> = this._onDidChangeResponsiveState.event;

src/vs/workbench/services/output/common/outputChannelModel.ts

@@ -365,7 +365,7 @@ export class BufferredOutputChannel extends Disposable implements IOutputChannel
 
 class BufferedContent {
 
-	private static MAX_OUTPUT_LENGTH = 10000 /* Max. number of output lines to show in output */ * 100 /* Guestimated chars per line */;
+	private static readonly MAX_OUTPUT_LENGTH = 10000 /* Max. number of output lines to show in output */ * 100 /* Guestimated chars per line */;
 
 	private data: string[] = [];
 	private dataIds: number[] = [];

src/vs/workbench/services/textfile/test/textFileEditorModelManager.test.ts

@@ -311,4 +311,4 @@ suite('Files - TextFileEditorModelManager', () => {
 		manager.disposeModel((model as TextFileEditorModel));
 		manager.dispose();
 	});
-});
+});