dotnet-11

FileInfo caches its size, enumeration reads NTFS's lazily updated directory entry, and the writer may still hold bytes in its own buffers. Refresh(), or better, read the length from a shared handle with RandomAccess.GetLength.

The tool package targets a newer .NET than the SDK running the install, or it is not a .NET tool at all. Use a newer SDK, pin a tool version with a compatible tools folder, or force --framework.

Balancing groups (?<name>) and (?<-name>) turn a .NET regex capture group into a stack, so one pattern can match arbitrarily nested parentheses or <div> tags. The full pattern, how the stack works, inner-content capture with (?<inner-open>), and the gotchas verified on .NET 11 RC1: the empty-stack check, catastrophic backtracking, NonBacktracking, and mixed bracket types.

A compiled model is generated C# that recreates your EF Core model without running OnModelCreating. Measured on EF Core 11 RC1: model load drops from 714 ms to 215 ms at 500 entities, but the MSBuild route (which replaced EFOptimizeContext) is slower, stale models fail silently, and query filters block generation.

A transparent struct is one the ABI treats exactly like its only field. .NET 11 has no such guarantee: a struct wrapping a double is passed in RCX on Windows x64 but in XMM0 on Linux and macOS. Here is the disassembly from the .NET 11 JIT on three ABIs, the P/Invoke bugs it causes, and how to write wrapper types that are safe at every boundary.

A shadow property is a column EF Core tracks without a matching CLR property. Here is why EF Core 11 creates them (missing FK properties, misnamed FKs, type mismatches, split relationships), how to spot the BlogId1 kind in a migration, how to fix each cause, and how to use shadow properties on purpose.

AddDbContextPool hands out one scoped DbContext per DI scope, so it cannot run two queries at once. AddDbContextFactory and AddPooledDbContextFactory give you a context per call, which is what parallel queries need. Measured on EF Core 11 RC 1: the pooled factory creates a context in 342 ns and 40 B versus 17 us and 44 KB.

C# Dev Kit 11.0 pre-release replaces six managed processes with a single Native AOT CSDevKit process and a persistent project cache. A 407-project Aspire solution is ready in 3.0s instead of 84.1s, using 316 MB instead of 2,072 MB.

Switch on the union value, not .Value, and use a switch expression or add case null to a switch statement. Statements need null coverage that expressions only warn about.

If your Executable profile runs dotnet run or dotnet watch, the inner command applies the default profile and overwrites your variables. Add --no-launch-profile, and use SDK 10.0.200+.