1530 repositories for csharp

Client Tools for NuGet - including Visual Studio extensions, command line tools, and msbuild support. (Open issues on https://github.com/nuget/home/issues)
ASP.NET Core is a cross-platform .NET framework for building modern cloud-based web applications on Windows, Mac, or Linux.
Blazor Component Library based on Material design with an emphasis on ease of use. Mainly written in C# with Javascript kept to a bare minimum it empowers .NET developers to easily debug it if needed.
i-Tool bot is a general purpose bot that has moderation commands, can check your CS:GO, Battlefield 3, 4, H and HOTS stats, has C# evaluation and a lot more!
A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. Targets .NET Framework 4.7, as well as .NET Core 2.1, .NET Core 3.0, .NET 6, .NET Standard 2.0 and 2.1. Supports the unit test frameworks MSTest2, NUnit3, XUnit2, MSpec, and NSpec3.