This is Mono. Installation: Read doc/download for installation instructions, or read the HTML version: http://www.go-mono.com/download.html * Using Mono Once you have installed the software, you can run a few programs: * runtime engine mono program.exe or mint program.exe * C# compiler mcs program.cs * CIL Disassembler monodis program.exe See the man pages for mono(1), mint(1), monodis(1) and mcs(2) for further details. * A directory roadmap: doc/ Contains documentation and the web site contents. mono/ The core of the Mono Runtime. metadata/ The object system and metadata reader. jit/ The Just in Time Compiler. dis/ CIL executable Disassembler cli/ Common code for the JIT and the interpreter. io-layer/ The I/O layer and system abstraction for emulating the .NET IO model. cil/ Common Intermediate Representation, XML definition of the CIL bytecodes. interp/ Interpreter for CLI executables. arch/ Architecture specific portions.