title: System.Threading.ThreadAbortException in classlibrary
body: <p>I have a wpf application which will call a class library as a plugin to connect with wcf service every time. When call a service method in class library, it will give the above exception. And the exception message is 
  <code>er = {Unable to evaluate expression because the code is optimized or a native frame is on top of the call stack.}</code>Even the stack trace also has the above message. What is the solution?</p>