I can not guarantee it, but it's to work, I do not find anyone complaining. But I also find people saying that 2013 projects are recognized by 2012, contrary to what you say. Then it may be that you are having specific problems. As far as I know there were problems in previous versions.

Of course new versions may use new features that will not be recognized by older versions of VS. That would be incompatible. In all versions this kind of thing happens. This is why the file .sln has the format version.

If you need this you should have both so it's easy to test and find out if your case works out right or wrong. If this is a specific problem, you can ask here (opening something with all the details) if you have to work around it.

The MVC type project in VS 2015 has improvements, of course, that if something new is used, VS 2013 will not even recognize it.

I know it does not respond to what you want to know but it would be nice to read this .

Are projects created in Visual Studio 2015 recognized in Visual Studio 2013?

As of this date, yes. I did a test creating an ASP.NET Web Application project.

Incidentally, the Visual Studio 2015 project already comes with all the packages in the most current version, unlike Visual Studio 2013 which, when starting a project, needs to update packages by Update-Package . >

Still on Visual Studio 2015, there is no longer the possibility of creating backward-compatible project for Visual Studio 2012, as there was in Visual Studio 2013.