title: Difference between User Control and Custom Control Library
body: <p>I'm working on creating a date/time user control in WPF using C# 2008.  My first user control.  I'm also using Matthew MacDonald's book, "Pro WPF in C# 2008".  In that book he strongly recommended creating a user control using the WPF Custom Control Library project template; so I followed his suggestion.  I've finished writing the code which would go into what I think of as the code-behind file.  Now I'm ready to write the XAML.</p>
  
  <p>The only problem is, I just discovered there is no corresponding .xaml file?  So, I don't get why using a WPF Custom Control Library project is better, or prefered, when writing a user control?</p>