title: How can I find all usages of a namespace and its members?
body: <p>I am trying to search a large solution for any usages of a given namespace or its members, say, <code>System.IO</code>.</p>
  
  <p>Resharper's Find Usages allows me to find references to <code>System.IO</code>, but only when used explicitly. If a file declares <code>using System.IO;</code> then uses any of the namespace's members without the full name, only the <code>using</code> reference is found. I need to find any usage of any <em>member</em> of the namespace in each file as well.</p>
  
  <p>Can this be accomplished in Visual Studio, Resharper, or any other plugin do this search for me?</p>