SlackBuildsOrg/development/mono

Mono is a software platform designed to allow developers to easily create 
cross platform applications.  It is an open source implementation of 
Microsoft's .Net Framework based on the ECMA standards for C# and the Common 
Language Runtime.  We feel that by embracing a successful, standardized 
software platform, we can lower the barriers to producing great applications 
for Linux.

Note:
 - Mono build relies on a working Mono C# compiler to compile itself
   (also known as bootstrapping). However, without Mono installed, the
   build process uses the 'monolite' distribution, which contains just
   enough to run the 'mcs' compiler.
   This is considered a "slightly more risky approach" to build Mono.
   So, besides Mono sources, this SlackBuild uses a full featured
   and precompiled Mono Compiler to bootstrap.