Best way to create a “run-once” time delayed function in C#

Question

I am trying to create a function that takes in an Action and a Timeout, and executes the Action after the Timeout. The function is to be non-blocking. The function must be

Answer 1

Why not simply invoke your action parameter itself in an asynchronous action?

Action timeoutMethod = () =>
  {
       Thread.Sleep(timeout_ms);
       action();
  };

timeoutMethod.BeginInvoke();