On November 10, Microsoft officially launched .NET 11 at the virtual .NET Conf 2026 conference, unveiling a series of updates aimed at improving runtime performance, boosting developer productivity, and advancing AI application development across web, mobile, and desktop scenarios. The release spans components including C# 15, ASP.NET Core, and .NET MAUI, helping to reduce development wait times and streamline the modern application-building process. On the performance front, it delivers hundreds of optimizations across the runtime and base libraries, cutting the overhead associated with repeatedly starting up tooling. For AI, it introduces a built-in MCP server template, along with AI libraries and agent frameworks, while Blazor adds experimental AI interface components. In terms of the programming experience, C# 15 introduces union types. For cross-platform development, .NET MAUI now adopts the CoreCLR runtime by default and improves UI debugging and testing, while Windows Forms offers optional modern visual styles. .NET 11 is a Standard Term Support release and will be supported for two years.