diff --git a/extensions/vscode-api-tests/src/singlefolder-tests/workspace.fs.test.ts b/extensions/vscode-api-tests/src/singlefolder-tests/workspace.fs.test.ts
index d58bcc2bca98eafb04cbefa5b8a514c1634deda4..06728e206d941b09b56d51deb517e98bdb7180bb 100644
--- a/extensions/vscode-api-tests/src/singlefolder-tests/workspace.fs.test.ts
+++ b/extensions/vscode-api-tests/src/singlefolder-tests/workspace.fs.test.ts
@@ -83,7 +83,7 @@ suite('workspace-fs', () => {
 
 		// ensure non empty folder cannot be deleted
 		try {
-			await vscode.workspace.fs.delete(folder, { recursive: false });
+			await vscode.workspace.fs.delete(folder, { recursive: false, useTrash: false });
 			assert.ok(false);
 		} catch {
 			await vscode.workspace.fs.stat(folder);
@@ -100,7 +100,7 @@ suite('workspace-fs', () => {
 		}
 
 		// delete non empty folder with recursive-flag
-		await vscode.workspace.fs.delete(folder, { recursive: true });
+		await vscode.workspace.fs.delete(folder, { recursive: true, useTrash: false });
 
 		// esnure folder/file are gone
 		try {
diff --git a/src/vs/vscode.proposed.d.ts b/src/vs/vscode.proposed.d.ts
index e182ea0629ccf4445e443ef4323228971d4b2960..41a3463b7b618a12501ee8e3a8dd0d7567efbc10 100644
--- a/src/vs/vscode.proposed.d.ts
+++ b/src/vs/vscode.proposed.d.ts
@@ -1638,17 +1638,16 @@ declare module 'vscode' {
 		 *
 		 * @param uri The uri of the file.
 		 * @param content The new content of the file.
-		 * @param options Defines if missing files should or must be created.
 		 */
-		writeFile(uri: Uri, content: Uint8Array, options?: { create: boolean, overwrite: boolean }): Thenable<void>;
+		writeFile(uri: Uri, content: Uint8Array): Thenable<void>;
 
 		/**
 		 * Delete a file.
 		 *
 		 * @param uri The resource that is to be deleted.
-		 * @param options Defines if deletion of folders is recursive.
+		 * @param options Defines if trash can should be used and if deletion of folders is recursive
 		 */
-		delete(uri: Uri, options?: { recursive: boolean }): Thenable<void>;
+		delete(uri: Uri, options?: { recursive: boolean, useTrash: boolean }): Thenable<void>;
 
 		/**
 		 * Rename a file or folder.
diff --git a/src/vs/workbench/api/browser/mainThreadFileSystem.ts b/src/vs/workbench/api/browser/mainThreadFileSystem.ts
index 4df264ea14ead4639d5f3475c6bc255471e93b9e..0d232f2870d1842a173b7e4321dc6d045a626a58 100644
--- a/src/vs/workbench/api/browser/mainThreadFileSystem.ts
+++ b/src/vs/workbench/api/browser/mainThreadFileSystem.ts
@@ -79,9 +79,8 @@ export class MainThreadFileSystem implements MainThreadFileSystemShape {
 		return this._fileService.readFile(URI.revive(uri)).then(file => file.value).catch(MainThreadFileSystem._handleError);
 	}
 
-	$writeFile(uri: UriComponents, content: VSBuffer, opts: FileWriteOptions): Promise<void> {
-		//todo@joh honor opts
-		return this._fileService.writeFile(URI.revive(uri), content, {}).catch(MainThreadFileSystem._handleError);
+	$writeFile(uri: UriComponents, content: VSBuffer): Promise<void> {
+		return this._fileService.writeFile(URI.revive(uri), content).catch(MainThreadFileSystem._handleError);
 	}
 
 	$rename(source: UriComponents, target: UriComponents, opts: FileOverwriteOptions): Promise<void> {
diff --git a/src/vs/workbench/api/common/extHost.protocol.ts b/src/vs/workbench/api/common/extHost.protocol.ts
index 0bdb48ef1c2281d91197be09199bb443b2686b14..99b544184cac5906d5acbb98c385d0bdf0ee0c60 100644
--- a/src/vs/workbench/api/common/extHost.protocol.ts
+++ b/src/vs/workbench/api/common/extHost.protocol.ts
@@ -612,7 +612,7 @@ export interface MainThreadFileSystemShape extends IDisposable {
 	$stat(uri: UriComponents): Promise<files.IStat>;
 	$readdir(resource: UriComponents): Promise<[string, files.FileType][]>;
 	$readFile(resource: UriComponents): Promise<VSBuffer>;
-	$writeFile(resource: UriComponents, content: VSBuffer, opts: files.FileWriteOptions): Promise<void>;
+	$writeFile(resource: UriComponents, content: VSBuffer): Promise<void>;
 	$rename(resource: UriComponents, target: UriComponents, opts: files.FileOverwriteOptions): Promise<void>;
 	$copy(resource: UriComponents, target: UriComponents, opts: files.FileOverwriteOptions): Promise<void>;
 	$mkdir(resource: UriComponents): Promise<void>;
diff --git a/src/vs/workbench/api/common/extHostFileSystem.ts b/src/vs/workbench/api/common/extHostFileSystem.ts
index ddef167c30770b873e05f70123df889ac7632825..8eae35ee7d8213abcb6f94229d08aef90d3cbe32 100644
--- a/src/vs/workbench/api/common/extHostFileSystem.ts
+++ b/src/vs/workbench/api/common/extHostFileSystem.ts
@@ -119,11 +119,11 @@ class ConsumerFileSystem implements vscode.FileSystem {
 	async readFile(uri: vscode.Uri): Promise<Uint8Array> {
 		return this._proxy.$readFile(uri).then(buff => buff.buffer).catch(ConsumerFileSystem._handleError);
 	}
-	writeFile(uri: vscode.Uri, content: Uint8Array, options: { create: boolean; overwrite: boolean; } = { create: true, overwrite: true }): Promise<void> {
-		return this._proxy.$writeFile(uri, VSBuffer.wrap(content), options).catch(ConsumerFileSystem._handleError);
+	writeFile(uri: vscode.Uri, content: Uint8Array): Promise<void> {
+		return this._proxy.$writeFile(uri, VSBuffer.wrap(content)).catch(ConsumerFileSystem._handleError);
 	}
-	delete(uri: vscode.Uri, options: { recursive: boolean; } = { recursive: false }): Promise<void> {
-		return this._proxy.$delete(uri, { ...options, useTrash: false }).catch(ConsumerFileSystem._handleError);  //todo@joh useTrash
+	delete(uri: vscode.Uri, options: { recursive: boolean; useTrash: boolean; } = { recursive: false, useTrash: false }): Promise<void> {
+		return this._proxy.$delete(uri, options).catch(ConsumerFileSystem._handleError);
 	}
 	rename(oldUri: vscode.Uri, newUri: vscode.Uri, options: { overwrite: boolean; } = { overwrite: false }): Promise<void> {
 		return this._proxy.$rename(oldUri, newUri, options).catch(ConsumerFileSystem._handleError);