.NET Core is Open Source - MSDN BlogsNo trial. No credit card required. Just your GitHub account. Today is a huge day for .NET! We’re happy to announce that .NET Core will be open source, including the runtime as well as the framework libraries. This is a natural progression of our open source efforts, which already covers the managed compilers (C#, VB, and F#) as well as ASP.NET: C# & Visual Basic (“Roslyn”) Visual F# Tools ASP.NET
