I need a free compiler for C # on Unix. Someone please point me to the packages or better, use the terminal commands in Mint to install the software [sorry I'm low with Unix]?
Try http://mono-project.com
Just enter the terminal
sudo apt-get install mono-devel
You may also need a development environment with support for MonoDevelop for .NET.
sudo apt-get install monodevelop
Mono comes with several C # compilers .