title: .net MemoryCache - notify on item removed
body: <p>I'm using a .net Memory Cache with .NET 4.0 and c#, I want my application to be notified when an item is removed (so I can write that it has been removed to a log file or notify the UI, that the item is removed).</p>
  
  <p>Is there anyway to do this.</p>
  
  <p>I'm using  System.Runtime.Caching.MemoryCache not System.Web.Caching</p>