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

Answer 2

Visual Studio 2013 supports "round tripping" with support for solutions as far back as VS2010. There are some exceptions where an upgraded project may be required, depending on the type of project(s) in the solution. Generally, you can open and save solutions from VS2010, VS2012 and of course, any created in VS2013.