After you install Microsoft Visual Studio 2008 Service Pack 1, in some situations, when you try to use Data Source Configuration Wizard to create a connection, you may see the following error messages,
Error message 1:
Could not load type 'Microsoft.VisualStudio.DataDesign.SyncDesigner.SyncFacade.SyncManager' from assembly Microsoft.VisualStudio.DataDesign.SyncDesigner.DslPackage, Version = 126.96.36.199, Culture=neutral, PublicKey Token=b03f5f7f11d50a3a
Error message 2:
The type initializer for 'Microsoft.VisusalStudio.DataDesign.SyncDesigner.SyncFacade.SyncTableConfigManager' threw an exception
These are due to an incomplete installation of Service Pack 1 or an incorrect installation of Microsoft Synchronization Services for ADO.net.
We have written a KB article (KB2001115) to explain the details and provide the solutions. Please see here if you met these issues,
If you need any further help, let us know.