diff --git a/src/vs/workbench/contrib/bulkEdit/browser/bulkFileEdits.ts b/src/vs/workbench/contrib/bulkEdit/browser/bulkFileEdits.ts
index 73a7234fd28..077f9f8d5c0 100644
--- a/src/vs/workbench/contrib/bulkEdit/browser/bulkFileEdits.ts
+++ b/src/vs/workbench/contrib/bulkEdit/browser/bulkFileEdits.ts
@@ -120,9 +120,9 @@ class CreateOperation implements IFileOperation {
 			return new Noop(); // not overwriting, but ignoring, and the target file exists
 		}
 		if (this.options.folder) {
-			await this._workingCopyFileService.createFolder([{ resource: this.newUri }], this.undoRedoInfo, token);
+			await this._workingCopyFileService.createFolder({ resource: this.newUri }, this.undoRedoInfo, token);
 		} else {
-			await this._workingCopyFileService.create([{ resource: this.newUri, contents: this.contents, overwrite: this.options.overwrite }], this.undoRedoInfo, token);
+			await this._workingCopyFileService.create({ resource: this.newUri, contents: this.contents, overwrite: this.options.overwrite }, this.undoRedoInfo, token);
 		}
 		return this._instaService.createInstance(DeleteOperation, this.newUri, this.options, { isUndoing: true }, !this.options.folder && !this.contents);
 	}
diff --git a/src/vs/workbench/services/textfile/browser/textFileService.ts b/src/vs/workbench/services/textfile/browser/textFileService.ts
index 208a0cda90b..615fa0ca4bb 100644
--- a/src/vs/workbench/services/textfile/browser/textFileService.ts
+++ b/src/vs/workbench/services/textfile/browser/textFileService.ts
@@ -151,8 +151,7 @@ export abstract class AbstractTextFileService extends Disposable implements ITex
 	async create(resource: URI, value?: string | ITextSnapshot, options?: ICreateFileOptions): Promise<IFileStatWithMetadata> {
 		const readable = await this.getEncodedReadable(resource, value);
 
-		const result = await this.workingCopyFileService.create([{ resource, contents: readable, overwrite: options?.overwrite }]);
-		return result[0];
+		return await this.workingCopyFileService.create({ resource, contents: readable, overwrite: options?.overwrite });
 	}
 
 	async write(resource: URI, value: string | ITextSnapshot, options?: IWriteTextFileOptions): Promise<IFileStatWithMetadata> {
diff --git a/src/vs/workbench/services/workingCopy/common/workingCopyFileService.ts b/src/vs/workbench/services/workingCopy/common/workingCopyFileService.ts
index 1c3d2055b1a..c54bc352be7 100644
--- a/src/vs/workbench/services/workingCopy/common/workingCopyFileService.ts
+++ b/src/vs/workbench/services/workingCopy/common/workingCopyFileService.ts
@@ -164,7 +164,7 @@ export interface IWorkingCopyFileService {
 	 * Working copy owners can listen to the `onWillRunWorkingCopyFileOperation` and
 	 * `onDidRunWorkingCopyFileOperation` events to participate.
 	 */
-	create(operations: ICreateFileOperation[], undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata[]>;
+	create(operation: ICreateFileOperation, undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata>;
 
 	/**
 	 * Will create a folder and any parent folder that needs to be created.
@@ -175,7 +175,7 @@ export interface IWorkingCopyFileService {
 	 * Note: events will only be emitted for the provided resource, but not any
 	 * parent folders that are being created as part of the operation.
 	 */
-	createFolder(operations: ICreateOperation[], undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata[]>;
+	createFolder(operation: ICreateOperation, undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata>;
 
 	/**
 	 * Will move working copies matching the provided resources and corresponding children
@@ -271,12 +271,12 @@ export class WorkingCopyFileService extends Disposable implements IWorkingCopyFi
 
 	//#region File operations
 
-	create(operations: ICreateFileOperation[], undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata[]> {
-		return Promise.all(operations.map(o => this.doCreateFileOrFolder(o, true, undoInfo, token)));
+	create(operation: ICreateFileOperation, undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata> {
+		return this.doCreateFileOrFolder(operation, true, undoInfo, token);
 	}
 
-	createFolder(operations: ICreateOperation[], undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata[]> {
-		return Promise.all(operations.map(o => this.doCreateFileOrFolder(o, false, undoInfo, token)));
+	createFolder(operation: ICreateOperation, undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata> {
+		return this.doCreateFileOrFolder(operation, false, undoInfo, token);
 	}
 
 	async doCreateFileOrFolder(operation: ICreateFileOperation | ICreateOperation, isFile: boolean, undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata> {
diff --git a/src/vs/workbench/services/workingCopy/test/browser/workingCopyFileService.test.ts b/src/vs/workbench/services/workingCopy/test/browser/workingCopyFileService.test.ts
index 3ea04364e32..cb1562c837d 100644
--- a/src/vs/workbench/services/workingCopy/test/browser/workingCopyFileService.test.ts
+++ b/src/vs/workbench/services/workingCopy/test/browser/workingCopyFileService.test.ts
@@ -224,7 +224,7 @@ suite('WorkingCopyFileService', () => {
 			eventCounter++;
 		});
 
-		await accessor.workingCopyFileService.createFolder([{ resource }]);
+		await accessor.workingCopyFileService.createFolder({ resource });
 
 		assert.equal(eventCounter, 3);
 
@@ -459,7 +459,7 @@ suite('WorkingCopyFileService', () => {
 			eventCounter++;
 		});
 
-		await accessor.workingCopyFileService.create([{ resource, contents }]);
+		await accessor.workingCopyFileService.create({ resource, contents });
 		assert.ok(!accessor.workingCopyService.isDirty(model.resource));
 		model.dispose();
 
diff --git a/src/vs/workbench/test/browser/api/mainThreadEditors.test.ts b/src/vs/workbench/test/browser/api/mainThreadEditors.test.ts
index cf370439d42..ffb4e0e6f61 100644
--- a/src/vs/workbench/test/browser/api/mainThreadEditors.test.ts
+++ b/src/vs/workbench/test/browser/api/mainThreadEditors.test.ts
@@ -103,10 +103,8 @@ suite('MainThreadEditors', () => {
 		});
 		services.set(IWorkingCopyFileService, new class extends mock<IWorkingCopyFileService>() {
 			onDidRunWorkingCopyFileOperation = Event.None;
-			create(operations: ICreateFileOperation[]) {
-				for (const operation of operations) {
-					createdResources.add(operation.resource);
-				}
+			create(operation: ICreateFileOperation) {
+				createdResources.add(operation.resource);
 				return Promise.resolve(Object.create(null));
 			}
 			move(operations: IMoveOperation[]) {
diff --git a/src/vs/workbench/test/common/workbenchTestServices.ts b/src/vs/workbench/test/common/workbenchTestServices.ts
index 6a00cd3ef4d..1cd6d63130f 100644
--- a/src/vs/workbench/test/common/workbenchTestServices.ts
+++ b/src/vs/workbench/test/common/workbenchTestServices.ts
@@ -201,8 +201,8 @@ export class TestWorkingCopyFileService implements IWorkingCopyFileService {
 
 	getDirty(resource: URI): IWorkingCopy[] { return []; }
 
-	create(operations: ICreateFileOperation[], undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata[]> { throw new Error('Method not implemented.'); }
-	createFolder(operations: ICreateOperation[], undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata[]> { throw new Error('Method not implemented.'); }
+	create(operation: ICreateFileOperation, undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata> { throw new Error('Method not implemented.'); }
+	createFolder(operation: ICreateOperation, undoInfo?: IFileOperationUndoRedoInfo, token?: CancellationToken): Promise<IFileStatWithMetadata> { throw new Error('Method not implemented.'); }
 
 	move(operations: IMoveOperation[], undoInfo?: IFileOperationUndoRedoInfo): Promise<IFileStatWithMetadata[]> { throw new Error('Method not implemented.'); }