From https://github.com/Microsoft/vscode/issues/33476 **TypeScript Version:** 2.5.1 **Code** ```ts interface IFoo { bar(): number; } class Foo implements IFoo { } ``` Trigger the implement interface quick fix on `class Foo` **Expected behavior:** Users can configure if single or double quotes are used for the `Method not implemented error` **Actual behavior:** Double quotes are always used for the `Method not implemented error` ```ts interface IFoo { bar(): number; } class Foo implements IFoo { bar(): number { throw new Error("Method not implemented."); } } ``` Related to #13270