I’ve just updated EFProviderWrappers sample to v1.02. It’s a bugfix release, which fixes two bugs:

• NotImplementedException during SaveChanges() when saving more than 1 entity
• Non-query commands were sometimes cached which was causing update to fail

The code can be downloaded from:

http://code.msdn.microsoft.com/EFProviderWrappers/Release/ProjectReleases.aspx?ReleaseId=4747