.NET 11 Preview 6 is now available with improvements across the entire .NET ecosystem. Key highlights include stream adapters for memory and text, async validation with DataAnnotations, System.Text.Json support for C# union types, runtime-async performance improvements, JIT improvements, NativeAOT faster interface dispatch, SIMD lane construction APIs, enhanced dotnet test options with xUnit v3 and NUnit support, automatic CSRF protection in ASP.NET Core, OpenAPI 3.2 by default, Blazor Virtualize scroll-to-item, SignalR authentication refresh, LINQ query translation improvements in EF Core, unconstrained foreign key relationships, CollectionView2 for Windows in .NET MAUI, and various F# language improvements.
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