title: In which namespace is the DelegateCommand in?
body: <p>I am trying to work out an example from &quot;.NET Domain Driven Design with C#&quot;, which contains a code example where you can see declared some attributes of type <code>DelegateCommand</code>.</p>
  <p>Now, I've tried googling it up, but I can't find its reference anywhere on MSDN (actually, I found <a href="http://msdn.microsoft.com/en-us/library/ff921126.aspx" rel="noreferrer">this</a> article, but not <code>DelegateCommand</code>'s article itself).</p>
  <p>Is the <code>DelegateCommand</code> something that's part of <code>WPF</code> or is it just something created in the book?</p>
  <p>If it's part of WPF (or any other MS product), in which assembly/namespace is it?</p>