Browse All .NET Content (294)

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.

Daniel Roth hosts an ASP.NET Community Standup covering what’s new for ASP.NET Core and Blazor in .NET 11 Preview 6, including async minimal API validation, automatic CSRF protection, OpenAPI 3.2 updates, unions, and improvements across Blazor and SignalR.

This week's Weekly .NET Roundup centers on two tracks: staying current with July 2026 servicing updates (including CVE fixes, containers, and known issues) and getting early signal from .NET 11 Preview 6. Mobile teams have a clear action item with .NET MAUI moving to CoreCLR-only on Android, iOS, and Mac Catalyst, while Visual Studio continues to expand Copilot workflows with built-in Agent Skills, model selection, and new extension governance options. We also cover practical modernization and agent operations patterns, from a structured ASP.NET-to-.NET 10 course to OpenTelemetry-instrumented local agents, plus a Durable Functions approach for long-running MCP tools on Azure Functions.

Authorised Territory demonstrates how to add server-side logging to a .NET MCP server and surface those log messages in a .NET console client when the client invokes a tool.

Pablo Lopes announces a free, open-source course that guides developers through modernizing a legacy ASP.NET app to .NET 10 using the GitHub Copilot modernization agent, including assessment and planning artifacts, an execution workflow, and a final deployment to Azure App Service.

Lily Ma explains why synchronous MCP tool calls break down for long-running work, and shows a practical Azure Functions + Durable Functions pattern you can use today while the MCP Tasks extension rolls out across clients and SDKs.

Ruben Rios announces a preview of Private Marketplace support in Visual Studio, aimed at organizations that need tighter control over how developers discover and install extensions for security, compliance, and governance reasons.

Visual Studio Code runs through the five most popular VS Code extensions in 2026 so far, highlighting what developers are installing to improve their day-to-day workflow inside the editor.

Authorised Territory demonstrates how to add console telemetry to a .NET AI agent harness by wiring up a trace provider and emitting traces using OpenTelemetry, with a local Ollama model (gpt-oss) used as the LLM runtime.

The Visual Studio Code Team shares the evolving release notes for VS Code 1.130 (Insiders), with links to the commit log and closed issues so developers can track what’s landing in the build as features are added.

Rachel Kang explains new Visual Studio features for working with GitHub Copilot models: pinning favorites in the model picker, comparing model capabilities (like context window size and vision support), and tracking context window and plan usage so long-running chats don’t catch you off guard.

Rahul Bhandari (MSFT) and Tara Overfield recap the July 2026 servicing releases for .NET and .NET Framework, including a list of fixed security vulnerabilities (CVEs) and direct links to release notes, installers, container images, Linux package instructions, and known issues for supported .NET versions.

David Ortinau shares a progress update on moving .NET MAUI mobile apps to CoreCLR in .NET 11 Preview 6, including current performance expectations, tooling status (debugging and Hot Reload), and what developers should validate now to influence the .NET 11 GA release.

.NET Team announces .NET 11 Preview 6 and highlights what’s new across the runtime, SDK, libraries, ASP.NET Core, .NET MAUI, C#, Entity Framework Core, F#, and container images, with links to detailed release notes and download instructions to try the preview.

Simona Liao, Wendy Breiding, and Yun Jung Choi introduce Visual Studio 18.8’s built-in Agent Skills, a set of reusable Copilot capabilities for common .NET and Azure tasks. The post explains where to find and enable skills, why they’re off by default, and highlights starter skills for API work, performance reviews, Azure deployments, and Kusto queries.

Erik Ejlskov Jensen presents SQL Database Project Power Tools, focusing on improving the day-to-day workflow for SQL Database Projects by extending the tooling developers use in Visual Studio and SQL Server Management Studio (SSMS).