Browse All .NET Content (290)

Amaury Levé explains how Microsoft.Testing.Platform (MTP) reporting helps teams move from a failing CI build to actionable evidence, with inline annotations in GitHub Actions and Azure DevOps, Azure DevOps-only history-based flaky/regression triage, crash-resilient TRX output, and multiple report formats for both humans and automation.

Mike Hulme explains why Microsoft was named a Leader in Gartner’s 2026 Magic Quadrant for AI-augmented code modernization tools, and outlines how GitHub Copilot modernization and Azure are positioned to assess, upgrade, and migrate legacy applications with agentic workflows while keeping developers in control.

Fokko at Work demos selected new features in Visual Studio Code 1.132 that affect day-to-day Copilot Chat and editor workflows, including tracking session activity from the chat input, starting side chats with /btw, terminal output reflow, and dictation onboarding/customization, with notes on enterprise policy and plan-based availability.

EldertGrootenboer explains why some .NET Framework WCF Relay listeners start failing against Azure Relay after TLS 1.0/1.1 retirement, and outlines practical fixes ranging from app config changes to code updates and machine-wide registry settings.

Bruno Capuano, Pranav Senthilnathan, and Tarek Mahmoud Sayed walk through MCP C# SDK 2.0 and what its stateless-first approach means for building .NET AI agents, including standardized HTTP support, multi round-trip requests, and compatibility considerations, plus an overview of Microsoft Foundry Hosted Agents for scalable AI solutions.

Visual Studio Code shares a quick tip on using IntelliSense in the integrated terminal to speed up command-line work and reduce typos while you’re working inside VS Code.

The Visual Studio Code Team shares the 1.133 Insiders release notes, highlighting a change for extension authors: custom editor extensions can now set different default priorities for normal editing versus diff views, improving how custom editors behave when comparing files.

Authorised Territory demonstrates a .NET MCP server pattern where a tool call starts a background task and returns a task handle instead of an immediate result, while a .NET client polls the server every second until the final output is available.

Bruno Capuano shows how to build a Windows-only C# console app that performs live speech-to-text locally using Foundry Local and a compact Nemotron streaming ASR model, including model lifecycle management (download/cache/load/unload) and real-time interim/final transcription via async streams.

Giles Odigwe announces the stable release of the GitHub Copilot Agent for Microsoft Agent Framework in .NET and Python, showing how to use Copilot’s coding harness (shell, file, URL, and MCP tools) with Agent Framework features like middleware, streaming, OpenTelemetry tracing, and human-in-the-loop approvals.

Allison summarizes the CodeQL 2.26.2 release for GitHub code scanning, including new language support (Swift 6.3.3 and Kotlin 2.4.10), query behavior changes that may surface more findings, and a breaking change affecting how query authors embed links in alert messages.

Andrew Lock explains the new CSRF protection in ASP.NET Core (.NET 11 preview 6) that uses Fetch Metadata HTTP headers instead of synchronizer tokens, including how the middleware decides to allow or deny requests and what changes (if any) app authors need to make.

.NET Team announces upcoming NuGet.org publishing security changes: new API keys will be capped at 30 days starting August 17, 2026, and older keys will expire on November 1, 2026. The post explains the supply-chain risk of long-lived secrets and recommends migrating to NuGet Trusted Publishing using OIDC.

Daniel Roth and Javier Calvarro Nelson tour what’s new for ASP.NET Core and Blazor in .NET 11 Preview 7, including Blazor output caching, QuickGrid virtualization improvements, and changes to Blazor Server circuit behavior.

This week's .NET roundup centers on MCP becoming a practical foundation for agent tooling, with the MCP C# SDK v2.0 and new Agent Framework hooks that let agents discover skills at runtime with clearer safety boundaries. Visual Studio and VS Code also pushed further into agent-driven workflows, from a Copilot Chat Agent preview to an MCP-backed MSBuild binlog analyzer that can explain failures and performance bottlenecks. On the engineering side, the focus shifted to reliable automation (a unit-test agent that validates tests end-to-end and traced multi-agent orchestration with OpenTelemetry) plus a solid web security refresher on Fetch Metadata headers for defense-in-depth CSRF protection.

Amaury Levé introduces an open-source polyglot unit-test generation agent that learns a repo’s conventions, writes tests, and validates they build and run in the project’s normal test workflow. The post explains the agent’s research/plan/execute/check loop, shows benchmark results versus stock Copilot, and includes setup commands for Copilot CLI and VS Code.

Authorised Territory demonstrates how a .NET MCP server can expose a skill as a resource, and how an AI agent client can use that skill to answer a question, using a locally running LLM via Ollama.

Shawn Henry and Tamir Dresher show how to run a multi-agent “Squad” team on top of the GitHub Copilot CLI/SDK and expose it as a first-class Microsoft Agent Framework (MAF) AIAgent in a .NET app, including DI wiring, session configuration, and OpenTelemetry-based observability.

Visual Studio Code shares a quick tip for reducing token usage and improving GitHub Copilot results by running a grammar check on your prompt before submitting it in VS Code.

Allison summarizes the July 2026 updates for GitHub Copilot in Visual Studio, including a new preview agent built on the Copilot SDK, built-in .NET and Azure skills, selected-code review actions, and organization-wide custom instructions for consistent Copilot behavior across teams.

Visual Studio Code highlights three popular dark themes for VS Code—One Dark Pro, Midnight City, and Tokyo Night—prompting developers to compare the look and pick a favorite for their editor setup.

Rachel Kang introduces a new “thinking effort” control in Visual Studio 18.9 Insiders 2 that lets developers tune how much reasoning supported AI models use per request. The post explains the available levels, where to configure them in the model management UI, and how higher reasoning settings affect usage credits and response depth.

Andrew Lock explains the browser Fetch Metadata request headers (Sec-Fetch-Site, Sec-Fetch-Mode, Sec-Fetch-Dest, and Sec-Fetch-User), what their values mean, and how servers can use them to spot suspicious cross-origin requests and add another layer of CSRF defense alongside tokens and SameSite cookies.

The Visual Studio Code Team shares the evolving release notes for VS Code 1.132 (Insiders), with links to the commit log and closed issues so developers can track what’s landing as features are added throughout the iteration.

Jeff Handley announces MCP C# SDK v2.0, which implements the 2026-07-28 MCP specification revision. The post explains the new stateless-first HTTP transport, standardized routing headers, and Multi Round-Trip Requests (MRTR) for interactive tools, plus what stays backward compatible and what changes for Tasks and other extensions.

Bruno Capuano and Angel Hernandez discuss practical enterprise patterns for adding AI capabilities to modern .NET applications, with a focus on moving from prototypes to production. The session covers architecture approaches, AI-powered workflows, and tools and practices that help teams build reliable intelligent experiences.

Mark Downie introduces the Visual Studio July update, centered on a new Agent (Preview) in Copilot Chat built on the GitHub Copilot SDK. The post also covers built-in .NET and Azure skills, org-level Copilot custom instructions, attaching Git branches as chat context, and improved MSVC toolset discovery for reproducible C++ builds.

Visual Studio Code shows the different ways to split the integrated terminal, making it easier to work with multiple shells or tasks side-by-side while staying inside the editor.

Sergey Menshykh explains how .NET agents can discover and load Agent Skills directly from a Model Context Protocol (MCP) server using the Microsoft Agent Framework, so teams can publish skills centrally and have agents pull them on demand without redeploying.

Visual Studio Code shows how the new Migration feature in VS Code turns existing prompts into reusable skills, focusing on a faster way to organize and reuse prompt-driven workflows inside the editor.

Yuliia Kovalova and Jan Krivanek introduce the MSBuild Binlog Analyzer for VS Code, a preview extension that uses GitHub Copilot Chat plus an MCP server to explain build failures, pinpoint performance bottlenecks, compare builds, and spot regressions directly from MSBuild .binlog files.

This week in .NET, Microsoft Agent Framework hit a more practical stride with a batteries-included runtime (Harness) and Declarative Workflows 1.0 that moves multi-agent orchestration into YAML you can review and change without rewriting core code. On the web stack, .NET 11 Preview 6 focused on safer defaults and sharper APIs, including async validation for minimal APIs, automatic CSRF protection, and OpenAPI updates that help keep server and client contracts aligned. We also saw VS Code refine the in-editor agent experience and more hands-on guidance for building MCP servers in .NET, with sampling and logging patterns that improve repeatability and observability. Rounding things out, hybrid integration stayed in focus with a detailed walkthrough for running Azure Logic Apps Hybrid on a self-managed Kubernetes setup.

Authorised Territory demonstrates a .NET AI agent setup where an agent is allowed to rename a file inside a confined folder using the .NET Agent Framework harness, with a local Ollama-hosted LLM (gpt-oss) driving the agent’s decisions.

Reynald Adolphe and members of the VS Code and GitHub Copilot teams recap the past month’s updates, with live demos of notable Visual Studio Code improvements and GitHub Copilot changes, plus a chance for viewers to ask questions in chat.

Kayla Cinnamon gives a quick tour of the redesigned editor panel inside the Agents window in VS Code 1.129, showing how the updated layout supports agent-driven workflows and keeps code editing and AI-assisted interactions in one place.

Peter Ibekwe announces Agent Framework Declarative Workflows 1.0 for both Python and .NET, showing how to define multi-agent orchestration in YAML (branching, state, handoffs, and human approvals) and then load and run it as a standard runtime workflow.

anandgmenon walks through running Azure Logic Apps Hybrid on a self-managed RKE2 Kubernetes cluster, including how to provide an ingress IP with MetalLB, connect the cluster to Azure Arc, install the Container Apps extension, and fix the RKE2-specific DNS and inotify issues that can break deployments.

Authorised Territory demonstrates how to add sampling to a .NET Model Context Protocol (MCP) server so an MCP tool can call back into a client’s locally running LLM (via Ollama) using a chat client.

The Visual Studio Code Team shares the ongoing release notes for VS Code 1.131 (Insiders), including links to the commit log and closed issues so developers can track what’s landing in the build as features are added.

Wes Steyn announces the release of the Microsoft Agent Framework Harness, a batteries-included runtime that turns a chat model into a production-ready agent with planning, tool-calling, memory, approvals, web search, and OpenTelemetry built in for both .NET and Python.