.NET 11 Preview 3 is now available, bringing improvements across the runtime, SDK, libraries, ASP.NET Core, .NET MAUI, C#, Entity Framework Core, and container images. Key highlights include: System.Text.Json gains more naming and default-ignore control; Zstandard compression moves to System.IO.Compression; runtime async removes the preview-API opt-in requirement; JIT optimizations improve switches, bounds checks, and casts; WebAssembly gets WebCIL and debugging improvements; the SDK adds file-based app splitting across files and `dotnet run -e` for passing environment variables; ASP.NET Core adds Zstandard response compression and earlier HTTP/3 request processing; .NET MAUI adds map clustering, XAML startup improvements, and Android 17/API 37 preview support; and EF Core improves SQL generation, migrations, and DbContext configuration.
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