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2026-04-13 dotnet-11 ef-core

EF Core 11 Adds Native SQL Server Vector Search with DiskANN Indexes

EF Core 11 Preview 2 supports SQL Server 2025 VECTOR_SEARCH() and DiskANN vector indexes directly from LINQ. Here is how to set up the index, run approximate queries, and what changes from the EF Core 10 VectorDistance approach.

2026-04-08 csharp dotnet

C# 15 Union Types Are Here: Type Unions Ship in .NET 11 Preview 2

C# 15 introduces the union keyword for type unions with exhaustive pattern matching and implicit conversions. Available now in .NET 11 Preview 2.

2026-04-06 dotnet-11 csharp

.NET 11 Runtime Async Replaces State Machines with Cleaner Stack Traces

Runtime Async in .NET 11 moves async/await handling from compiler-generated state machines into the runtime itself, producing readable stack traces, correct breakpoints, and fewer heap allocations.

2026-10-14 dotnet-11 csharp cbor

.NET 11 RC 2 Lets CborReader Parse a Payload One Chunk at a Time

System.Formats.Cbor 11.0.0-rc.2 adds isFinalBlock, NeedsMoreData, and SlideData to CborReader, so you can decode CBOR straight off a stream without buffering the whole document. Verified on SDK 11.0.100-rc.2.

2026-10-14 comparison dotnet csharp

FileSystemWatcher vs polling for detecting file changes on a network share in .NET

On an SMB or NFS share, polling is the source of truth and FileSystemWatcher is at best a hint. FileSystemWatcher misses remote changes on Linux and macOS, overflows its 64 KB network buffer, and stops for good when the connection drops. Use a periodic snapshot diff, and let the watcher only trigger an early scan. Verified on .NET 10.0.10.

2026-10-14 github-copilot ai-agents code-review

How to Request a Copilot Code Review From the REST API and Set Its Effort Level

Request a GitHub Copilot code review from a script with the REST requested_reviewers endpoint, the GraphQL requestReviewsByLogin mutation, or gh pr edit, then control whether it runs at Lite or Balanced effort. Covers the bot login, the effort precedence chain, why the per-request effort field announced on October 2, 2026 is not in the published schemas yet, and how to read the effort that actually ran.

2026-10-14 comparison csharp dotnet

Thread.Sleep vs Task.Delay vs SpinWait for waiting in C#

Use await Task.Delay for any timed wait in async code, Thread.Sleep only on a dedicated thread you own, and SpinWait only for sub-microsecond waits inside lock-free code. To wait for a condition, use a signal (ManualResetEventSlim, SemaphoreSlim, TaskCompletionSource) instead of any of the three. Measured on .NET 10.0.10.

2026-10-13 mcp azure dotnet

Azure MCP Server 3.0 rejects unknown parameters and creates resources secure by default

Azure MCP Server 3.0.0 shipped on October 12, 2026. Tool calls with unknown parameters now fail, options like subscription and tenant were removed from many tools, new Storage accounts disable Shared Key auth, and the server speaks the stateless MCP 2026-07-28 protocol.

2026-10-13 errors dotnet dotnet-10

Fix: FileInfo.Length returns a stale size for a file that is still being written on Windows

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.

2026-10-13 errors ef-core ef-core-10

Fix: NU1608 / NU1107 version conflict between Pomelo.EntityFrameworkCore.MySql and EF Core 10

Pomelo 9.0.0 only allows EF Core Relational 9.0.x and has no EF Core 10 build. Keep every EF Core package on 9.0.x, or switch to Microting.EntityFrameworkCore.MySql 10.0.x. Suppressing the warning crashes at startup.

2026-10-13 errors flutter flutter-3-47

Fix: pubspec.lock shows as modified after flutter upgrade or switching Flutter versions

The Flutter SDK pins versions of meta, vector_math, test_api and matcher, so every SDK change re-resolves your lockfile, and flutter upgrade runs pub upgrade on the project you stand in. Pin one Flutter version per repo and enforce the lockfile in CI.

2026-10-13 github-copilot ai-agents opentelemetry

How to Export GitHub Copilot App Agent Sessions to an OpenTelemetry Backend

Send GitHub Copilot app agent traces, token metrics and events to your own OTLP collector with the telemetry block in enterprise managed settings. Covers every telemetry key, the six content-capture classes, delivery via .github-private, MDM or a root-owned file, channel precedence, a collector config with bearer auth, and the gotchas that make exports silently go nowhere.

2026-10-12 errors flutter ios

Fix: "does not support provisioning profiles" when archiving a Flutter iOS app after migrating to Swift Package Manager

A provisioning profile passed to xcodebuild on the command line applies to every SwiftPM resource bundle target. Set manual signing on the Runner target instead.

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