.NET 11 RC1 Brings C# 15 Unions and Experimental Blazor AI Components
Microsoft shipped .NET 11 Release Candidate 1 on September 8, 2026, with a go-live license, C# 15 union types and experimental Blazor components for agent UIs.
Microsoft & .NET AI
News about Microsoft, GitHub and .NET AI: .NET releases, Microsoft.Extensions.AI, Agent Framework, Azure AI Foundry, Copilot and Build and Ignite announcements.
16 stories
Microsoft is one of the largest investors in AI, and many of its announcements directly affect .NET developers. This category tracks .NET and C# releases with AI features, new AI libraries and SDKs, Azure AI Foundry and Copilot updates, GitHub's AI tools, and the major AI announcements from Microsoft Build and Ignite.
GitHub Copilot App Goes GA as a Desktop Hub for Parallel AI Agents
GitHub's Copilot desktop app reached general availability on June 17, 2026, giving developers one place to run parallel AI agent sessions in isolated worktrees.
Microsoft Unveils Seven In-House MAI Models at Build 2026
At Build 2026 on June 2, Microsoft launched seven in-house MAI models, led by the MAI-Thinking-1 reasoning model and the MAI-Code-1-Flash coding model.
GitHub Copilot SDK Reaches General Availability with .NET Support
GitHub made the Copilot SDK generally available on June 2, 2026, letting .NET, TypeScript, Python and Go apps embed Copilot's agent runtime via a stable API.
Microsoft and OpenAI Amend Their Partnership, Ending Azure Exclusivity
Microsoft and OpenAI amended their partnership on April 27, 2026: OpenAI can sell on any cloud, Azure ships first and Microsoft keeps IP rights through 2032.
Microsoft Agent Framework 1.0 Ships with Stable .NET and Python APIs
Microsoft Agent Framework reached 1.0 on April 2, 2026, with stable .NET and Python packages for agents and workflows while key integrations stayed in preview.
Aspire 13.2 Adds an AI-Agent-Native CLI and TypeScript AppHosts
Aspire 13.2, released March 23, 2026, turned aspire mcp into aspire agent with skills for AI coding agents and previewed TypeScript AppHosts.
Microsoft Launches Copilot Cowork, Built with Anthropic, for Microsoft 365
Microsoft announced Copilot Cowork on March 9, 2026, an agent built with Anthropic that carries out multi-step tasks across Microsoft 365 with approval gates.
MCP C# SDK Reaches 1.0 with Stable APIs for .NET Developers
The official Model Context Protocol C# SDK shipped 1.0.0 on February 25, 2026, giving .NET teams stable APIs, a SemVer promise and MCP 2025-11-25 support.
Microsoft Unveils Maia 200, an Inference-First AI Accelerator for Azure
Microsoft unveiled Maia 200 on January 26, 2026, a 3nm Azure inference chip it says offers 30% better performance per dollar than its existing systems.
Microsoft Unveils Agent 365 at Ignite 2025 to Govern Enterprise AI Agents
At Ignite on November 18, 2025, Microsoft introduced Agent 365, a control plane for enterprise AI agents, alongside Microsoft Foundry and Claude models in Foundry.
.NET 10 LTS and C# 14 Released: What Changes for AI Developers
Microsoft released .NET 10 and C# 14 on November 11, 2025, as a three-year LTS with a faster runtime, post-quantum crypto and SDK tools for MCP servers.
Microsoft Agent Framework Preview Unites Semantic Kernel and AutoGen
Microsoft shipped the first preview of Microsoft Agent Framework on October 1, 2025, an open-source .NET and Python successor to Semantic Kernel and AutoGen.
Microsoft Open-Sources GitHub Copilot Chat for VS Code Under MIT
On June 30, 2025, Microsoft released the GitHub Copilot Chat extension for VS Code under the MIT license, exposing its agent mode, prompts and telemetry.
Microsoft.Extensions.AI and Vector Data Extensions Reach General Availability
Microsoft declared Microsoft.Extensions.AI and the Vector Data extensions generally available in May 2025, giving .NET a stable, provider-neutral AI layer.
Microsoft and Anthropic Launch the Official MCP C# SDK for .NET
Microsoft and Anthropic released an official C# SDK for the Model Context Protocol in April 2025, giving .NET teams a supported way to build MCP servers.
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