This error occurs with Smart Client Software Factory solutions in the following scenarios:
Infrastructure.Interface project properties (Name,
AssemblyName) have been modified.
Visual Studio 2008 SP1 (either beta or release version) has been installed.
The following fix works for both scenarios:
SCSF - April 2008 with VS2008 + SP1 Beta
Another possible cause could be that the Smart Client Guidance Package is not enabled. To enable it: In the
Tools menu item, select the Guidance Package option and enable the
Smart Client Development – April 2008 Guidance Package.
Please, let me know if it helps.