Extnesion method for Rx-ification

rxhelper.cs

public static class Async
{
  public static Func<Task<T>> Make<T>(Action<TaskCompletionSource<T>> action)
  {
	var completionSource = new TaskCompletionSource<T>();
	
	action(completionSource);
	
	return completionSource.Task;
  }
}


public async Task<User> GetUser()
{
    var _client = new GitHubClient
	{
	  Authenticator = new HttpBasicAuthenticator("user", "pass")
    };
					  
	var f = Async.Make<User>(cs => _client.Users.GetAuthenticatedUserAsync(cs.SetResult, _exceptionAction));
	
	var result = await f.Invoke();
	
	return result;
}