What is the purpose of “return await” in C#?

Question

Is there any scenario where writing method like this:

public async Task DoSomethingAsync()
{
    // Some synchronous code          


        

Answer 1

If you won't use return await you could ruin your stack trace while debugging or when it's printed in the logs on exceptions.

When you return the task, the method fulfilled its purpose and it's out of the call stack. When you use return await you're leaving it in the call stack.

For example:

Call stack when using await: A awaiting the task from B => B awaiting the task from C

Call stack when not using await: A awaiting the task from C, which B has returned.