MCP C# SDK v2.0 implements the 2026-07-28 specification with a stateless-first protocol, standardized HTTP headers, and Multi Round-Trip Requests for interactive tools, all while staying backward compatible.

Announcing ML.NET 3.0, with improvements for deep learning, DataFrame, performance, and more!

On November 12, 2014, as part of the Visual Studio 2015 Preview release, we released NuGet 3.0 Preview. This is a big release for us (albeit a preview), and we're excited to start getting feedback on our changes. Visual Studio 2012+ This NuGet 3.0 Preview is included in Visual Studio 2015 Preview. We are working to get preview drops out for Visua...

As we work on the designs for getting NuGet in the platform, it has become clear that NuGet needs better support for carrying arbitrary artifacts in packages and exposing them for consumption after the initial package installation. Conventional Manifests Since NuGet's initial release, it has supported conventional manifests and only a few concept...

As NuGet continues to gain momentum, more Microsoft teams have been seeking to install NuGet packages from their Visual Studio tooling. This began with ASP.NET, where NuGet was born, when project templates started coming with pre-installed NuGet packages. More recently, we've heard of teams all across Microsoft with tooling gestures that result in ...

As we work on some big changes for NuGet 3.x, we're finding that we're at a crossroads: Should we use .NET 4.5 and improve our Visual Studio UI using new features available in Visual Studio 2012, Visual Studio 2013, and Visual Studio "14"; or should we retain support for Visual Studio 2010? Visual Studio 2010 has been supported since NuGet's intro...

Updated Sept. 2015: Our roadmap and requirements have changed and we have yet to implement these features as of NuGet v3.2. We are tracking this issue on GitHub. Please track this issue to follow our progress. We adopted Semantic Versioning (SemVer) in NuGet 1.6. At the time, SemVer 1.0.0 was the current version of the spec. Adopting SemVer provid...

The Warehouse is Dead, Long Live the Warehouse! Back in June, we blogged that our package statistics were full of lies. We made a fix and expected reports to become correct on June 26th. When June 26th came and went though, we discovered that the numbers were still questionable. Since then, we've identified a few other issues leading to invalid st...

Today marks an important milestone for Building NuGet 3.x; we've published a NuGet 3.0 CTP1 build of our Visual Studio extension. This preview release represents a few months of code refactoring and server-side architecture now being utilized by the client code. While the release doesn't show off any slick new NuGet features or even address very ma...

As part of Building NuGet 3.x, we have been working on a significant re-architecture of NuGet.org. Progress has been steady and we are starting to see a return on investment. In this post, we'll compare the legacy architecture to where we'll be in the near future. Legacy Architecture One of the goals when the NuGet Gallery project was started in ...