libmono-corlib4.5-cil - 6.12.0.199+dfsg-6 main

Mono is a platform for running and developing applications based on the
ECMA/ISO Standards. Mono is an open source effort led by Xamarin.
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.
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This empty package depends on the Core Library (mscorlib.dll) of Mono for CLI
4.5, which is the glue between the BCL (Base Class Libraries) and the JIT.
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You should install libmono-i18n-west4.0-cil if you are using
ISO 8859-15 (Latin 9) or other common Western European code pages.
US-ASCII, ISO 8859-1 (Latin 1) and UTF-8 users don't need any extra I18N
packages.