The .NET Insider – Issue 13

Your Digest of .NET Updates, Tools, and Insights

Author

Levan Jintcharadze
September 08, 2025

Your Monthly Dive into .NET Updates.

.NET 10 Preview 7 is now available! - .NET Blog

Seventh preview of .NET 10 with final refinements: faster runtime, ASP.NET Core & Blazor updates, and new C# 14 features.

devblogs.microsoft.com/dotnet/dotnet-10-preview-7

GPT-5 for Microsoft Developers - Microsoft for Developers

Microsoft unveils GPT-5 integration for developers, powering advanced reasoning across Visual Studio, Azure, and GitHub Copilot.

devblogs.microsoft.com/blog/gpt-5-for-microsoft-developers

Announcing the NuGet MCP Server Preview - .NET Blog

Preview of the NuGet MCP server, enabling AI-powered search, exploration, and integration of NuGet packages into workflows.

devblogs.microsoft.com/dotnet/nuget-mcp-server-preview

GPT-OSS - A C# Guide with Ollama - .NET Blog

Hands-on guide for running open-source GPT models via Ollama using C#, enabling AI-apps without external cloud dependencies.

devblogs.microsoft.com/dotnet/gpt-oss-csharp-ollama

Model Context Protocol (MCP) is Now Generally Available in Visual Studio 🎉 - Visual Studio Blog

Model Context Protocol (MCP) is generally available in Visual Studio, letting developers connect tools, data, and AI models directly inside the IDE.

devblogs.microsoft.com/visualstudio/mcp-is-now-generally-available-in-visual-studio

Designing Multi-Agent Intelligence - Microsoft for Developers

Deep dive into orchestrating multiple AI agents that collaborate to solve complex development and business problems.

devblogs.microsoft.com/blog/designing-multi-agent-intelligence

Copilot Diagnostics toolset for .NET In Visual Studio - .NET Blog

New diagnostics toolset in Visual Studio helps .NET devs improve Copilot suggestions with better warnings, insights, and fixes.

devblogs.microsoft.com/dotnet/github-copilot-diagnostics-toolset-for-dotnet-in-visual-studio

Bring Your Own Model to Chat in Visual Studio - Visual Studio Blog

Visual Studio Chat now supports custom AI models—use enterprise-trained or OSS models directly in your dev environment.

devblogs.microsoft.com/visualstudio/bring-your-own-model-visual-studio-chat

Enhance your CLI testing workflow with the new dotnet test - .NET Blog

Learn how .NET 10 transforms dotnet test with native Microsoft.Testing.Platform integration, delivering better performance and enhanced diagnostics.

devblogs.microsoft.com/dotnet/dotnet-test-with-mtp

Better Control over Your Copilot Code Suggestions - Visual Studio Blog

Gain granular control over GitHub Copilot in Visual Studio with new filtering, acceptance, and enterprise policy options.

devblogs.microsoft.com/visualstudio/better-control-over-your-copilot-code-suggestions

YARP Reverse Proxy in ASP.NET Core

Guide to building a reverse proxy in ASP.NET Core using YARP, including setup, configuration, and real-world use cases.

www.nikolatech.net/blogs/yarp-reverse-proxy-asp-dotnet-core

EFCore.Visualizer - View Entity Framework Core query plan inside Visual Studio - .NET Blog

Inspect EF Core query plans inside Visual Studio with the new EF Core Visualizer—helping devs tune queries more easily.

devblogs.microsoft.com/dotnet/ef-core-visualizer-view-entity-framework-core-query-plan-inside-visual-studio

Specification Pattern in EF Core: Flexible Data Access Without Repositories

Explains how to use the Specification Pattern in EF Core for clean, reusable, and flexible data access without heavy repositories.

antondevtips.com/blog/specification-pattern-in-ef-core-flexible-data-access-without-repositories

Getting Started with C# Eval Expression

Explore safe techniques for evaluating C# expressions dynamically, comparing different approaches and trade-offs.

www.nikolatech.net/blogs/csharp-eval-expression

Getting Started with the Aspire CLI - .NET Blog

Step-by-step guide to the Aspire CLI—scaffold, run, and manage Aspire-based apps directly from the terminal.

devblogs.microsoft.com/dotnet/getting-started-with-the-aspire-cli

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