libmono-system-runtime1.0-cil 2.4.2.3+dfsg-1 (amd64 binary) in ubuntu karmic

 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.
 .
 This package contains the Mono System.Runtime library for CLI 1.0.