During the development of a project using Visual Studio
how we can know default language version.
Here in this article I am going to create a application
using Visual Studio 2012 so default language version of my application should
be C# 5.0 .
Now
to know follow steps:
Right Click on you Project 's Solution Explorer ->
Select Properties.

Image 1.
Here Select Build -> Advance

Image 2.
Here see Language Version Drop Down.

Image 3.
Here see language version.

Image 4.