http://developers.de/blogs/damir_dobric/archive/2010/01/26/dataservices-0x80070006-error.aspxWhen working with Ado.Net data services you may get following error. Could not load file or assembly 'System.Data.Services.Client, Version=3.5.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of its dependencies. The handle is invalidenCommunityServer 2008 SP1 (Build: 30619.63)