mono-classlib-2.0 1.1.12-0ubuntu1 (amd64 binary) in ubuntu dapper

Mono class library (2.0)
 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 .NET CLR including compiler and runtime, which can
 produce and execute CIL bytecode (assemblies), and a .NET class library.
 .
 This package contains the Mono class library version 2.0
 (cross-platform CIL (.NET) libraries) that are used by nearly all CLI (.NET)
 programs on the system.