Migrating from Semantic Kernel to Microsoft Agent Framework: A C# Developer's Guide

Migrating from Semantic Kernel to Microsoft Agent Framework: A C# Developer's Guide The future of AI agent development in .NET is here — and it unifies everything. At .NET Conf 2025, Microsoft announced that Microsoft Agent Framework has reached Release Candidate status . This isn't just another SDK update — it's a major consolidation that merges Semantic Kernel and AutoGen into a single, unified framework for building AI agents. If you've been following my Semantic Kernel series, you might be wondering: What does this mean for my existing code? Should I migrate now? How different is the new API? Let's break it all down. What Changed and Why For the past two years, Microsoft maintained two separate agentic AI frameworks: Semantic Kernel — focused on orchestration, plugins, and enterprise integration AutoGen — focused on multi-agent conversations and research scenarios The problem? Developers were confused about which to use. Features overlapped. Codebases diverged. The community was fr