The Shared Source CLI implementation (beta) is a complete implementation of the ECMA C# and CLI standards that build and run on Windows XP and FreeBSD. It includes a complete build environment, along with test harnesses, documentation, and tools for working with the Shared Source CLI.

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Download Microsoft Shared Source Common Language Infrastructure; Beta 1 for Windows XP

Note: Windows XP and Visual Studio.NET, or FreeBSD 4.5. On Windows XP, the 11MB archive unpacks and builds into about a half gigabyte of disk of source and binaries.