In .NET 11, the runtime can suspend and resume async methods itself, so the C# compiler no longer generates a state machine for them. The feature is in preview and is opted into per project. The post shows the much smaller IL, cleaner stack traces, and what still changes when you debug.
.NET 11 moves async method suspension from compiler-generated state machines to the runtime, with the JIT optimizing the boundaries between async methods. The author reruns the official benchmarks on RC2 and compares allocations, stack traces and assembly size. The gains are real in synchronous await chains and exception-heavy paths, but measurement setup changes the picture.
Microsoft shipped out-of-band security updates for .NET 8, 9, 10 and .NET 11 RC3. CVE-2026-111497 fixes a Brotli decompression buffer overflow, and CVE-2026-114148 fixes unsafe ownership metadata in Linux tarballs. Two earlier fixes that the October 13 release missed were also re-shipped. Rebuilding self-contained apps and container images is required to pick up the fix.
Željko Perić benchmarks his custom multi-column sort extensions for 2D and jagged arrays against the standard LINQ OrderBy/ThenBy pipeline using BenchmarkDotNet. The results show how memory layout and sorting algorithm change speed and allocations on datasets up to one million rows. It is a practical reference for developers who care about GC pressure in data-heavy code.
.NET 11 RC2 adds Process.RunAndCaptureText, which runs an external command, drains stdout and stderr together and returns both strings with the exit code. It removes the deadlock that the classic redirect-and-ReadToEnd pattern can hit on noisy tools. Anyone who shells out to git, ffmpeg or internal CLIs will want to know the new helpers and their timeout behavior.
Andrew Lock introduces CBOR, a binary serialization format positioned as a more compact alternative to JSON, and shows how to use the System.Formats.Cbor package. The post walks through writing and reading CBOR with CborWriter and CborReader and explains the conformance modes that control the output.
This article walks through how the .NET 10 runtime's ReadOnlySpan<char>.IndexOf finds a substring using SIMD vector instructions. The author compares it with a naive loop in a BenchmarkDotNet run and explains where the speed difference comes from. It is a useful deep dive for developers who care about string search performance.