mono-mcs 2.10.5-1ubuntu1 (i386 binary) in ubuntu precise

 This is the Mono C# (C-Sharp) 2.0, 3.0 and 4.0 compiler,
 a platform-independent compiler which produces CIL (Common Intermediate
 Language) binary executables.
 This compiler targets the CLI 2.0 or 4.0 runtime version.
 .
 Mono is a platform for running and developing applications based on the
 ECMA/ISO Standards. Mono is an open source effort led by Novell.
 Mono provides a complete CLR (Common Language Runtime) including compiler and
 runtime, which can produce and execute CIL (Common Intermediate Language)
 bytecode (aka assemblies), and a class library.