Is there any pre installed compiler for c# in linux os like g++ for c++ and cc for c language

Question

if yes what is its command

Answer 1

No, but you can look at the Mono project (http://www.mono-project.com/docs/about-mono/languages/csharp/).

It is an open source implementation of C#, and has downloads for Windows, Linux and Mac OS X.

There is also an IDE based on Mono available (that used to be called MonoDevelop, but I think it's called something else now)