title: C#: Extended WPF Toolkit - Customixing Button Labels in a MessageBox
body: <p>I would like to implement a message box in my wpf-project. 
  The text is: "Choose Language:"
  The alternatives are English (OK) and German (Cancel).</p>
  
  <p>In this context, I am trying to customize the buttons in the MessageBox. For doing this, I try to implement the Extended WPF Toolkit, but I have problems in terms of understanding the documentation for the Extended WPF Toolkit. </p>
  
  <p>My code is like this:</p>
  
  <pre><code>"Xceed.Wpf.Toolkit.MessageBox msgBox = new Xceed.Wpf.Toolkit.MessageBox();
  msgBox.OkButtonContent = "English";
  msgBox.CancelButtonContent = "German";
  MessageBoxResult result =msgBox.ShowMessageBox("Choose Language: ", "Language",MessageBoxButton.OKCancel);"
  </code></pre>
  
  <p>Questions:</p>
  
  <p>1) Are the any other suitable controls to use where the user of the wpf application can choose among alternatives?</p>
  
  <p>2) Where do I find some nice example/documentation for customizing button labels in a message box?</p>