runtime
https://github.com/dotnet/runtime
C#
.NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.
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Help out
- Issues
- [Perf] Linux/arm64: 2 Regressions on 4/13/2026 11:16:41 PM +00:00
- Optimize ImmutableHashSet<T>.IsProperSubsetOf to avoid unnecessary allocations
- After installing .NET 11, some Chinese characters are displayed as question marks
- [API Proposal]: System.Text.Json union type support
- Add `Complex<T>` generic struct mirroring `Complex` API surface
- Support open generics in polymorphic serialization in System.Text.Json
- [cdac] Add IManagedTypeLayout contract for metadata-driven managed type layouts
- [browser] More Wasm.Build.Tests on CoreCLR
- Support typeof(T).Assembly.GetType(string) in ILLink dataflow analysis
- [SRM] Optimize building the blob heap.
- Docs
- C# not yet supported