title: unhandled microsoft .net framework exception in w3wp.exe
body: <p>I am writing a console application which uses a workflow service. 
  I tried to attach the visual studio to IIS process to debug my application in two visual studio console but it didn't work and after that when I try to do something with my service ( update the service, build the service, open the service in browser and etc) just in-time debugger pops up:
  An unhandled Microsoft .net framework exception occurred in w3wp.exe[every time diffident number here]</p>
  
  <p>P.S. I have a running service in IIS and before changing setup I didn't have any problem but now even after restarting I still have this problem.</p>