Use async in a method that has nothing to await

Sometimes we we want to decorate an intrinsically synchronously method with async, and we receive this error.

This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread.

That error message tells us one way to solve the problem, but its recommendation is to open up another thread, which isn't necessarily what we want to do.

public async Task<MyObject> GetEntity()  
{
    // run on a new thread
    return await Task.Run(() => new MyObject());
}

Instead, we can use Task.Yield(), which yields control to the calling method. Here is a Fiddle and a small snippet.

public async Task<MyObject> GetEntity()  
{
    // return control to the caller
    await Task.Yield();

    // continue later on the same thread
    return new MyObject();
}

Task.Yield() has a similar effect to Task.Delay(0) and Task.FromResult(0).