Microsoft Releases .NET 11 Preview 3 with Updates Across Runtime, SDK, MAUI, and ASP.NET Core

2026-04-29 · Source: InfoQ · Field: Technology & Digital — Software Development & Engineering · Depth: Intermediate, quick

Summary

Microsoft has released .NET 11 Preview 3, the third preview of its upcoming Standard Term Support version, slated for general availability in November 2026. This update introduces significant changes across multiple components, including the runtime, SDK, libraries, ASP.NET Core, Entity Framework Core, .NET MAUI, and C#. Key runtime enhancements include Runtime Async no longer requiring a preview flag, along with added support for NativeAOT and ReadyToRun, and JIT compiler optimizations for branchless checks and faster unsigned integer casts. The SDK and CLI now support creating solution filter files, a "#:include" directive for file-based apps, and new options for "dotnet run" and "dotnet watch". ASP.NET Core gains Zstandard compression, Blazor's Virtualize component adapts to measured item sizes, and Kestrel processes HTTP/3 requests faster. Entity Framework Core introduces a new "GetEntriesForState" API, while .NET MAUI receives Map control enhancements like pin clustering and custom styling, plus Android 17 preview support. C# 15 also sees improved IDE support for union types.

Key takeaway

For software engineers developing with .NET, this preview signals significant improvements in performance, developer experience, and cross-platform capabilities. You should review the specific updates in ASP.NET Core, .NET MAUI, and the SDK to understand how they might streamline your development workflows and enhance application performance, especially for web and mobile projects targeting the November 2026 release.

Key insights

.NET 11 Preview 3 advances core components, enhancing performance, developer tooling, and cross-platform capabilities.

Principles

• Optimize for developer workflow efficiency.
• Improve runtime performance and startup times.

Method

The release integrates new features across the .NET ecosystem, including JIT optimizations, SDK command enhancements, and framework-specific updates for web, data, and mobile development.

In practice

• Use "dotnet sln" to manage solution filter files.
• Explore Zstandard compression in ASP.NET Core.
• Implement pin clustering in .NET MAUI Map controls.

Topics

• .NET 11 Preview 3
• Runtime Optimizations
• .NET SDK
• ASP.NET Core
• Entity Framework Core

Code references

• dotnet/core

Best for: Software Engineer, Tech Journalist

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Editorial summary, takeaway, and curation by AIssential. Original article published by InfoQ.