title: New line is not working in MessageBox in C#/WPF
body: <p>Short question: I have a string in my resources: "This is my test string {0}\n\nTest"</p>
  
  <p>I'm trying to display this string in my Messagebox:</p>
  
  <pre><code>MessageBox.Show(String.Format(Properties.Resources.About, 
      Constants.VERSION), 
      Properties.Resources.About_Title, MessageBoxButton.OK, 
      MessageBoxImage.Information);
  </code></pre>
  
  <p>However I don't get new lines. The \n still show up as characters, not as new lines.</p>
  
  <p>I also tried to use a workaround like mystring.Replace("\n", Environment.NewLine) but this also doesn't change anything.</p>
  
  <p>What am I doing wrong?</p>
  
  <p>Edit: Funny thing to mention: Replace("\n", "somethingelse") doesn't change anything. </p>
  
  <p>Edit2: Shift+Enter in my Resource-File instead of \n seems to work... Strange behaviour anyway</p>