How to make an Asynchronous Method return a value?

Question

I know how to make Async methods but say I have a method that does a lot of work then returns a boolean value?

How do I return the boolean value on the callback?

Clarification:

public bool Foo(){     Thread.Sleep(100000); // Do work     return true; } 

I want to be able to make this asynchronous.

Answer 1

From C# 5.0, you can specify the method as

public async Task<bool> doAsyncOperation() {     // do work     return true; }  bool result = await doAsyncOperation();