title: SharePoint 2013 Event Receiver Assembly Error
body: <p>Sorry, my English is bad, but i will try to explain what i mean. </p>
  
  <p>I made EventReceiver on Developer PC on VisualStudio 2012 and it's work on my developer's SharePoint2013 Server.</p>
  
  <p>I made WSP packgage, deployed it to Client's SharePoint 2013 Server, activated feature and get an Error.</p>
  
  <p>Could not load type 'Microsoft.SharePoint.Administration.SPDiagnosticsService' from assembly 'Microsoft.SharePoint, Version=15.900.0.0, Culture=neutral, PublicKeyToken=71e9bce111e9429c'. </p>
  
  <p>How i understood it's SharePoint.Dll version is another, but i can't find this version and don't know where it's on clients server.</p>