.NET 11 Preview Emphasizes Core Engineering Over AI\n\nMicrosoft's .NET 11 preview cycle (expected November 2026) is focusing squarely on nuts-and-bolts engineering rather than AI hype. The early previews highlight core runtime, SDK, web framework, and language improvements.\n\nKey .NET 11 Preview 1-3 Highlights:\n\n- C# 15 Union Types — Represent values that can be one of several case types with exhaustive switch checking\n- Runtime Async — Enabled by default in Preview 3 (no EnablePreviewFeatures flag needed) \n- Performance — Continued JIT optimizations, bounds-check elimination\n- ASP.NET Core — Native OpenTelemetry tracing, Zstandard compression, Blazor TempData for static SSR\n- CLI Improvements — dotnet run -e for env vars, solution filter CLI, dotnet watch enhancements for Aspire hosts\n\nAzure SDK April 2026 Release\n\n- Azure.AI.Projects 2.0 — Stable release, architectural changes for Azure AI Foundry integration\n- Cosmos DB 4.79.0 — Java RCE fix (CWE-502), N-Region synchronous commit support, Query Advisor, BM25 hybrid search \n- New Provisioning — Network 1.0 & Private DNS 1.0 (stable), plus API Management/Batch/Compute/Monitor beta releases
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