Start Debugging

Blog

Page 5 of 92

2026-09-17 mstest testing csharp

MSTest 4.4.1 Fixes the CS0121 Ambiguous Assert Calls That 4.4.0 Broke Below C# 14

MSTest 4.4.0 added Span<T> and ReadOnlySpan<T> overloads to Assert.Contains and Assert.DoesNotContain, which made ordinary array and string assertions fail with CS0121 on net8.0, net9.0, or any project below C# 14. MSTest 4.4.1, published on 2026-09-16, adds exact array overloads and constrained forwarders. Two explicit-generic call shapes still fail.

2026-09-17 comparison dotnet dotnet-11

Process.Run vs Process.Start in .NET 11: which should you use?

Use Process.Run when you start a tool and only care how it exited: one call, a timeout that kills the child, and a ProcessExitStatus with the signal. Keep Process.Start when you need the Process object: writing to stdin, reading output as it arrives, UseShellExecute, or killing a whole process tree.

2026-09-16 dotnet dotnet-11 jit

The .NET 11 JIT Devirtualizes Generic Virtual Methods, and the Allocation Goes With Them

Stephen Toub's Performance Improvements in .NET 11 post shows generic virtual method calls dropping from 6.7 ns and 24 bytes to 1.8 ns and zero allocation. Three RyuJIT pull requests unlocked inlining on the dispatch that used to be the most opaque one in .NET.

2026-09-16 errors github-copilot ai-agents

Fix: GitHub Copilot can't see a file because a content exclusion rule excludes it

"File is configured to be ignored by Copilot" or "Some files were excluded from the context" means a content exclusion rule matched. How to find the rule, why globs over-match, and how to narrow it.

2026-09-16 errors dotnet dotnet-10

Fix: UIKitThreadAccessException from MediaPicker.PickPhotosAsync when selecting multiple photos in .NET MAUI iOS

Picking 2 or more photos on iOS throws UIKitThreadAccessException in MAUI 10.0.100 and 10.0.101. MAUI reads PHPickerResult.ItemProvider after an await, off the main thread. Pin 10.0.90, upgrade to 10.0.110, or use a PHPicker shim.

2026-09-16 errors flutter android

Fix: Unexpected failure parsing device information from adb output in Flutter

Flutter 3.47.0 cannot parse adb rows whose serial is 22+ characters, so wireless and some USB Android devices vanish. Upgrade to 3.47.1 or later, or adb connect by IP.

2026-09-16 comparison ef-core ef-core-11

SQL Server compatibility level 150 vs 160: what changes for EF Core 11 queries

EF Core 11 now defaults UseSqlServer to compatibility level 160, which puts LEAST, GREATEST and two-argument LTRIM/RTRIM into your SQL, including every Take(n).FirstOrDefault(). Keep 160 on SQL Server 2022 and later; pin UseCompatibilityLevel(150) if any environment still runs SQL Server 2019.

2026-09-15 errors aspnetcore dotnet-10

Fix: ASP.NET Core API endpoints return 401 instead of redirecting to the login page after upgrading to .NET 10

In .NET 10 cookie auth answers API-style endpoints with 401/403 instead of a login redirect. Restore it per endpoint, globally, or with an AppContext switch.

2026-09-15 errors flutter android

Fix: flutter doctor --android-licenses says 'The --licenses option is no longer needed' with cmdline-tools 23

cmdline-tools 23.0 retired sdkmanager --licenses, so Flutter before 3.47.3 reports license status unknown. Upgrade Flutter, or pin cmdline-tools 22.0.

2026-09-15 errors ef-core ef-core-11

Fix: EF Core MigrateAsync and CanConnectAsync keep retrying on 'Login failed for user' for 60 seconds

EF Core's SQL Server existence check retries error 18456 for a full minute, with or without EnableRetryOnFailure. Fail fast, cap RetryTimeout, or wait for EF Core 12.