26 Nov 2012
Link to this post
11 Jul 2013
in reply to
I got a similar error message and want to share what worked for me.
I had the project in VS2010 and then tried to open it in VS2012 , for some reason I didn't have the .sln file and I was trying to compile when using "open website". In my opinion the issue could be related to a framework version conflict.
1- Install all the updates for Visual Studio 2012 and Sitefinity Thunder
2-Open (doubleclick) the "SitefinityWebApp.csproj" and let the VS do the some migration work, try to close (you will be asked to save the new .sln)
2- Open Visual Studio "as administrator" (run as administrator) in the development server, open the new .sln file, rebuild and the error message goes away.
I hope this help somebody.