runtime
https://github.com/dotnet/runtime
C#
.NET is a cross-platform runtime for cloud, mobile, desktop, and IoT apps.
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- Issues
- Enforce .editorconfig charset rules for changed project and resource files in CI
- [Regression] Significant performance drop in `Random.Next()` starting from .NET 8 with ReadyToRun enabled
- [ci-scan] Test failure: Microsoft.Extensions.Hosting.Tests.HostTests.CreateDefaultBuilder_RegistersEventSourceLogger on Apple Na [Content truncated due to length]
- [ci-scan] Test failure: System.Net.Tests.HttpResponseStreamTests.Write_ContentToClosedConnectionSynchronously_ThrowsHttpListener [Content truncated due to length]
- Connections to a secondary loopback alias crash or hang on macOS 26 + .NET 10 (apphost launch only)
- [API Proposal]: Add string.ReplaceWhere for predicate-based replacement and removal
- [Perf] Windows/x64: 4 Regressions on 7/3/2026 10:18:16 AM +00:00
- [Perf] Windows/x64: 1 Regression on 6/28/2026 5:31:55 PM +00:00
- Improve `GetChildren` / `GetChildKeys` performance for large configurations
- [API Proposal]: Custom converters for external types in `System.Text.Json` source generation
- Docs
- C# not yet supported