After migrating a Silverlight application in VS-2012, our existing service is not exposed in VS-2012. Or if we create a new Silverlight application in VS-2012 and want to use the existing service in new application then our existing service will not exposed in VS-2012. We can use existing service in VS-2012 Silverlight application by following the steps. 1. 1. We have to open the application in VS-2010 1. 2. If you are using n tier project in your then many other project will not be show ( incompatible ). But this is not a problem. You just clean the Silverlight client application. 1. 3. Expand the client project right click on Service References . Here it is important that if are using source control & if you have already ServiceReferences.ClientConfig file. Then it should also be check out & check that which service you ar...