http://developers.de/blogs/damir_dobric/archive/2009/07/26/command-line-proxy-generation-for-silverlight-3.aspxIn Silverlight 2 Add Service Reference as part of Visual Studio was the only way to generate proxies for Silverlight clients.  Now in Silverlight 3 there is a command-line tool called slsvcutil.exe , which allows customized command-line proxy generationenCommunityServer 2008 SP1 (Build: 30619.63)