Tools for working with the C#/VB/F# project system.

The Microsoft.VisualStudio.Threading is a xplat library that provides many threading and synchronization primitives used in Visual Studio and other applications.

The StreamJsonRpc library offers JSON-RPC 2.0 over any .NET Stream, WebSocket, or Pipe. With bonus support for request cancellation, client proxy generation, and more.

Managed Extensibility Framework (MEF) implementation used by Visual Studio

A testing framework for Visual Studio extensions

Integration test harness for Visual Studio extension development

Making it easier to write Visual Studio extensions

Customer feedback and issue tracker repository for Visual Studio Marketplace

Samples for building your own Visual Studio extensions

Documentation for extending Visual Studio with new types of projects.

Intellisense for VSCT files

Tools for writing Visual Studio extensions

A Visual Studio extension

A repo for upcoming changes to extensibility in Visual Studio, the new extensibility model, and language server protocol.

Roslyn analyzers for Visual Studio extensions