Visual C# .NET Blog

C# 15 introduces union types — declare a closed set of case types with implicit conversions and exhaustive pattern matching. Try unions in preview today and see the broader exhaustiveness roadmap. The post Explore union types in C# 15 appeared first on .NET Blog.

Discover what’s new in the v1.0 release of the official MCP C# SDK, including enhanced authorization, richer metadata, and powerful patterns for tool calling and long-running requests. The post Release v1.0 of the official MCP C# SDK appeared first on .NET Blog.

Azure DevOps enhanced support for Microsoft.Testing.Platform, from running tests to publishing results! The post Microsoft.Testing.Platform Now Fully Supported in Azure DevOps appeared first on .NET Blog.

Learn what features are in C# 14, which ships as part of .NET 10. The post Introducing C# 14 appeared first on .NET Blog.

Debugging doesn’t have to be a grind. With Copilot woven into Visual Studio, you get AI-powered breakpoints, insights, exception fixes, and performance summaries all right where you work. The post Copilot Diagnostics toolset for .NET In Visual Studio appeared first on .NET Blog.

Discover 5 practical GitHub Copilot Chat prompts to boost .NET development productivity, from code optimization to security reviews. The post 5 Copilot Chat Prompts .NET Devs Should Steal Today appeared first on .NET Blog.

Introducing Agent Quality and NLP evaluators in the Microsoft.Extensions.AI.Evaluation libraries. The post Exploring new Agent Quality and NLP evaluators for .NET AI applications appeared first on .NET Blog.

Discover how to build a full-stack application with React and Aspire, integrating a React front-end with an ASP.NET Core Web API and persisting data to a database. The post Building a Full-Stack App with React and Aspire: A Step-by-Step Guide appeared first on .NET Blog.

The MCP C# SDK has been updated to support the latest Model Context Protocol specification (2025-06-18), bringing structured tool output, elicitation support, enhanced security, and more to .NET developers building AI applications. The post MCP C# SDK Gets Major Update: Support for Protocol Version 2025-06-18 appeared first on .NET Blog.

Announcing content safety evaluations and other imporvements in the Microsoft.Extensions.AI.Evaluation libraries. The post Evaluating content safety in your .NET AI applications appeared first on .NET Blog.