Antonio,
>I just installed the new version of this framework (1.3) and I get the following error when I try to open the 'Northwind Sample App C#'"
>
>The selected file is not a valid Visual Studio Solution File
That's odd...does the VB project open correctly? You may need to uninstall / reinstall.
Regards,
Kevin McNeish
Eight-Time .NET MVP
VFP and iOS Author, Speaker & Trainer
Oak Leaf Enterprises, Inc.
Chief Architect, MM Framework
http://www.oakleafsd.com