Passing an *Awaitable* Anonymous Function as a Parameter

Question

Code first. This is what I'm trying to do. I'm close, but I think I just need to fix the way I've defined my parameter in the UpdateButton method.

private async void UpdateButton(Action<bool> post) {     if (!await post())         ErrorBox.Text = "Error posting message."; }  private void PostToTwitter() {     UpdateButton(async () => await new TwitterAction().Post("Hello, world!")); }  private void PostToFacebook() {     UpdateButton(async () => await new FacebookAction().Post("Hello, world!")); } 

Unfortunately, the !await post() doesn't work because, "Type 'void' is not awaitable." So the question is, how do I define my parameter in this method to support an awaitable parameter?

Here's how the TwitterAction().Post() is defined...

public virtual async Task<bool> Post(string messageId){...}

Answer 1

private async void UpdateButton(Func<Task<bool>> post) {     if (!await post())         ErrorBox.Text = "Error posting message."; } 

--EDIT--

UpdateButton(()=>Post("ss"));  private async void UpdateButton(Func<Task<bool>> post) {     if (!await post())         this.Text = "Error posting message."; }  public virtual async Task<bool> Post(string messageId) {     return await Task.Factory.StartNew(() => true); }