C#

.NET Core and Mono open source frameworks, and available IDEs.

DotNet SIG

The DotNet SIG is a group of Fedora contributors that maintain dotnet (and related) packages in Fedora. The goal of this group is to help to anyone interested in dotnet and to support others in creating and maintaining dotnet applications. See our wiki page for more details, ways to get in touch, or information about joining the SIG.

.NET Foundation

You can contribute to the .NET Core upstream on GitHub.com/dotnet