MCP C# SDK 1.0 Arrives: Enterprise .NET Agents Get Full MCP Spec Support and Auth Discovery
The Model Context Protocol just got its most enterprise-important SDK milestone to date. Microsoft’s official C# SDK for MCP has shipped version 1.0, bringing full compliance with the 2025-11-25 MCP specification and — crucially — improved authorization server discovery. For the .NET-heavy enterprise world, this isn’t a footnote. This is the unlocking event that makes serious production MCP deployments viable in environments that have standardized on Microsoft’s stack. What’s Actually New in 1.0 The headline feature is the improved authorization server discovery, which lands just as enterprises are grappling with the identity and access management questions that come with deploying agents at scale. ...