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Building AI features, agents and MCP servers with .NET. Every link was featured in The .NET Insider.
Microsoft and CopilotKit released an MIT-licensed .NET SDK for AG-UI, the open protocol for streaming agent events to user-facing apps. Any .NET service can now expose or consume agent endpoints that work with TypeScript and Python clients.
The experimental Microsoft.AspNetCore.Components.AI package renders streamed agent output, tool calls, approval prompts and shared state as Blazor components, on top of any IChatClient. Try it with the .NET 11 RC1 SDK and the AgenticUI sample.
Bring Your Own Model (preview) now runs on the new Agent (Preview), with Foundry, OpenAI, Anthropic and Ollama. The old BYOM flow is gone and Ollama models need re-adding.
Rules written in prompts fade as an agent's context fills up, so the article moves them into the build with TreatWarningsAsErrors, analyzers, .editorconfig and Central Package Management.
Links point to the original articles. Short descriptions are dotnetdevs.io commentary, not the authors' words.