Daily C# Briefing — monday 03 august 2026

Meet the open-source polyglot testing agent that learns from a repository, writes unit tests, and checks that they build and pass. The post From generated code to trusted code with a unit-test agent appeared first on .NET Blog.

Not every question deserves the same amount of thought. Renaming a variable isn’t the same as debugging a memory leak, and they don’t need the same level of thinking. So why should your model treat them the same way every time? Starting in Visual Studio 18.9 Insiders 2, it doesn’t have to. Supported models now come with a thinking […] The post Tell your model when to think harder appeared first on Visual Studio Blog.

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. The post Announcing v2.0 of the official MCP C# SDK appeared first on .NET Blog.

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. The post Announcing v2.0 of the official MCP C# SDK appeared first on .NET Blog.

There's a new Agent (Preview) in Copilot Chat, built on the same GitHub Copilot SDK that powers the GitHub Copilot CLI, that gets more done with less back-and-forth. The post Visual Studio July Update — Meet the New Agent, Powered by the GitHub Copilot SDK appeared first on Visual Studio Blog.

Meet the MSBuild Binlog Analyzer for VS Code - a Copilot-powered way to read MSBuild binary logs, explain and fix build failures with one click, compare builds, and catch regressions, backed by the Microsoft.AITools.BinlogMcp MCP server. The post Analyze MSBuild Binary Logs with Copilot in VS Code appeared first on .NET Blog.

A free, open-source, hands-on course that walks you through modernizing a real legacy ASP.NET application all the way to .NET 10 using the GitHub Copilot modernization agent, step by step. The post Announcing .NET Modernization for Beginners appeared first on .NET Blog.

Organizations are increasingly looking for greater control over extensions within development environments. Driven by security, compliance, and internal governance requirements, teams want more visibility into how developers discover and acquire extensions. To address these needs, we’re excited to begin previewing Private Marketplace support in Visual Studio. Private Marketplace for Visual Studio For organizations familiar with […] The post Visual Studio Administrator? Join our Private Marketplace Preview! appeared first on Visual Studio Blog.

You open the model picker, scroll past a dozen options, and pause. How are these models different? Which one should you actually use? And once you’re a few hundred messages deep, how much capacity is even left before things start dropping off? We’ve all been there. These are the kinds of questions Visual Studio now […] The post Pick, manage, and get the most from your models appeared first on Visual Studio Blog.

A recap of the latest servicing updates for .NET and .NET Framework for July 2026. The post .NET and .NET Framework July 2026 servicing releases updates appeared first on .NET Blog.

CoreCLR is now the only runtime for .NET MAUI mobile apps in .NET 11 Preview 6. Here is where we are, and why we need you to test today. The post CoreCLR Progress and the Mono Timeline for .NET MAUI appeared first on .NET Blog.

Find out about the new features in .NET 11 Preview 6 across runtime, SDK, libraries, ASP.NET Core, .NET MAUI, C#, Entity Framework Core, F#, and container images. The post .NET 11 Preview 6 is now available! appeared first on .NET Blog.

Find out about the new features in .NET 11 Preview 6 across runtime, SDK, libraries, ASP.NET Core, .NET MAUI, C#, Entity Framework Core, F#, and container images. The post .NET 11 Preview 6 is now available! appeared first on .NET Blog.

Visual Studio now includes built-in Agent Skills, created by experts from the .NET and Azure teams, to help you better customize your agentic workflow and complete development tasks more efficiently, starting with the 18.8 Release. Agent Skills are reusable capabilities that enable your agent to perform structured tasks more reliably (to learn more about what […] The post Built-in Agent Skills Bring .NET and Azure Expertise into Visual Studio appeared first on Visual Studio Blog.

One of the best parts of a Visual Studio Subscription is discovering benefits that can make your day-to-day development work easier and more cost effective. One benefit that deserves more attention is Azure Dev/Test pricing. In fact, it’s one of the most valuable benefits included with a Visual Studio Subscription. If you’re building cloud applications, testing new ideas, or maintaining multiple development environments, cloud costs can sometimes […] The post The Visual Studio Dev/Test Benefit: Freedom to Build, Test, and Experiment in Azure appeared first on Visual Studio Blog.

Modernize .NET applications in the GitHub Copilot app. Follow your upgrade from assessment through execution in an interactive upgrade canvas. The post Modernize .NET applications in the GitHub Copilot app appeared first on .NET Blog.

Modernize .NET applications in the GitHub Copilot app. Follow your upgrade from assessment through execution in an interactive upgrade canvas. The post Modernize .NET applications in the GitHub Copilot app appeared first on .NET Blog.

A practical tour of the Model Context Protocol tools for .NET build diagnostics - the full Binlog MCP toolset, how those tools run inside a GitHub Actions workflow, and what the evaluation data says about the efficiency gains. The post MCP Beyond the Chat Window: Build Diagnostics in CI appeared first on .NET Blog.

The June update includes a Copilot Usage window refresh with proactive alerts as you approach your limits, MCP servers now get a trust check before they run anything new. The post Visual Studio June Update – Track Your Usage, Trust Your Tools appeared first on Visual Studio Blog.

.NET 8 and .NET 9 will both reach end of support on November 10, 2026. Learn what this means and how to upgrade to .NET 10 (LTS). The post .NET 8 and .NET 9 will reach End of Support on November 10, 2026 appeared first on .NET Blog.