Is Visual Studio 2013 compatible with 2010 projects?

Question

VS2012 could open up VS2010 projects and leave them in a state where they would be usable in VS2010.

Does VS2013 have the same feature?

Answer 1

If you allow Visual Studio to upgrade the project automatically, you can open it in Visual Studio 2013, Visual Studio 2012, and Visual Studio 2010 SP1.

from following link

http://msdn.microsoft.com/en-us/library/vstudio/hh266747(v=vs.120).aspx