title: Messagebox.Show and DialogResult equivalent in MonoTouch
body: <p>I have a Yes/No dialog from UIAlertView with two buttons. I would like in my method to implement the logic similar to this:</p>
  
  <pre><code>if(messagebox.Show() == DialogResult.OK)
  </code></pre>
  
  <p>The thing is if I call UIAlertView.Show() the process continues. But I need to wait for the result of user interaction and return true or false depanding on clicking the second button. Is this possible in MonoTouch?</p>