The error “This project is incompatible with the c

Question

I installed Vs 2010 Express in my PC, and created a poject named myproject with .net 4.0, it works well in Vs 2010 Express.

Now I installed Vs 2012 Express in my PC, and open the project myproject and upgrade it to .net 4.5, it wells well in Vs 2012 Express too.

I delete the project myproject all files, then restore it from my old backup file, when I try to open the project from Vs 2010 Express, I get the following information.
"This project is incompatible with the current version of visual studio", why?

How can I open the project in Vs 2010 Express? I guess the Vs 2012 Express maybe mark the project as .net 4.5 and stored the information in the somewhere of hard drive. Although I restore the project myproject from old backup file, Vs 2010 Express still think it is a project of .net 4.5.

Thanks!

Answer 1

I received this error because during the BizTalk install I did not check the Developer Tools and SDK checkbox. I went back and modified my installation and that error went away for me now.

Answer 2

Installing KB2781514 - Update for Microsoft Visual Studio 2012 solved the problem for me.