C#(pronounced as see sharp) is a multi-paradigm programming language encompassing strong typing, imperative, declarative, functional, generic, object-oriented (class-based), and component-oriented programming disciplines. It was developed by Microsoft within its .NET initiative and later approved as a standard by Ecma (ECMA-334) and ISO (ISO/IEC 23270:2006). C# is one of the programming languages designed for the Common Language Infrastructure.
C# is a general-purpose, object-oriented programming language. Its development team is led by Anders Hejlsberg. The most recent version is C# 6.0 which was released in 2015.
I consider this the only truly cross-platform language. Although Java claims the same, in reality it is not really done. Besides, if you are planning on delivering to multiple platforms (i.e. Windows, Liunx, Mac, Mobile, PS4, X Box, etc.) this is the way to go.