mono-gmcs 1.2.2.1-1ubuntu1 (amd64 binary) in ubuntu feisty

 This is the Mono C# (C-Sharp) 2.0 compiler, a platform-independent compiler
 which produces CIL (Common Intermediate Language) binary executables.
 The gmcs compiler supports the C# 2.0 featureset like generics, anonymous
 methods, iterators, partial types and nullable types.
 .
 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.