mono-assemblies-base 1.1.12-0ubuntu2 (amd64 binary) in ubuntu dapper

Mono class library - transistion package
 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.
 .
 mono-assemblies-base is a metapackage for the "mono-assemblies-base to
 mono-classlib-1.0" transistion.