IT Home, November 11 — At the .NET Conf 2026 online conference held yesterday (November 10), Microsoft officially launched .NET 11, introducing a range of updates focused on runtime performance, development efficiency, and AI-powered application building, covering web, mobile, and desktop development.
IT Home note: .NET is a software development platform supported by Microsoft and maintained jointly with the open-source community. It is free and open-source, enabling developers to build a variety of applications, including website backends, desktop software, mobile apps, and cloud services.
This .NET 11 update focuses on performance, AI applications, and cross-platform development, encompassing C# 15, the web development framework ASP.NET Core, and the cross-platform framework .NET MAUI, reducing development wait times and simplifying the process of building modern applications.
In terms of performance, the new version introduces hundreds of runtime and core library optimizations, along with a natively compiled command-line interface and a warmed-up build service, reducing the overhead of repeatedly starting tools.
In terms of AI, the .NET 11 Development Kit includes a built-in MCP server template to help developers integrate application functionalities into the AI tool invocation system. The accompanying AI libraries and agent framework support model integration, tool invocation, and workflow orchestration. Blazor has also introduced experimental AI interface components for streaming chat, tool display, and action approval.
In terms of programming experience, C# 15 introduces union types, enabling programs to explicitly list different outcomes of an operation, with the compiler checking for any unhandled cases. For cross-platform development, .NET MAUI now defaults to the CoreCLR runtime, with improved UI debugging and testing capabilities; Windows Forms offers an optional modern visual style.
.NET 11 is a standard support version offering two years of support, while .NET 10 remains the long-term support option. Microsoft advises checking compatibility, dependencies, and hardware requirements before upgrading, and verifying the results through practical testing.
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Announcing .NET 11