$ sudo apt-get update
$ sudo apt-get install c-sharp-4.5-compiler

c-sharp-4.5-compiler is installed in your system.

Make ensure the c-sharp-4.5-compiler package were installed using the commands given below,

$ sudo dpkg-query -l | grep c-sharp-4.5-compiler*

You will get with c-sharp-4.5-compiler package name, version, architecture and description in a table

c-sharp-4.5-compiler package basic information: