title: VS 2010 Error “Object reference not set to an instance of an object” when adding Service Reference for WCF Service
body: <p>I have a VS2010 (RTM) solution which contains: </p>
  
  <p>WCF Service project<br>
  Console WCF client project<br>
  Class project for DataContracts and members<br>
  Class project for some simple classes </p>
  
  <p>I successfully added a service reference in the console client project and ran the client.  I then did a long dev cycle repeatedly modifying the service then updating console service reference.  I then changed the namespace and assembly names for the projects as well as the .cs using references and app.config.  I of course missed some things as it would not build so I eventually removed the project references and the service reference, cleaned and built successfully.  </p>
  
  <p>I then attempted to add the service reference again, it discovered it but threw the “Object reference not set to an instance of an object” when OK'ing.  Fix in answer below...</p>