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2026-10-11 csharp dotnet

How to tail a log file in C# while another process is still writing to it

Open the log with FileShare.ReadWrite | FileShare.Delete, seek to the end, poll for new bytes, decode them with your own UTF-8 Decoder instead of StreamReader, and handle truncation and rotation explicitly. A tested tail -F implementation for .NET 10 and .NET 11.

2026-10-26 dotnet csharp

How to use a different Serilog output template per log level from appsettings.json

outputTemplate is fixed per sink, so per-level formatting needs either an ExpressionTemplate with {#if @l ...} blocks or two Logger sub-loggers with ByIncludingOnly / ByExcluding filters. Both configured purely from appsettings.json, tested on Serilog 4.4, Serilog.Settings.Configuration 10.0.1 and Serilog.Expressions 5.0.

2026-10-04 dotnet dotnet-10

How to detect Windows session lock, unlock, logon and logoff events in a C# app

Use SystemEvents.SessionSwitch in a desktop or console app, override OnSessionChange in a Windows service, or hook WM_WTSSESSION_CHANGE yourself. Covers .NET 10 code for all three, the hidden '.NET System Events' thread, why services see logon but desktop apps do not, out-of-order notifications, and how to query the current lock state with WTSQuerySessionInformation.

2026-11-02 microsoft-agent-framework dotnet ai-agents

Agent Framework 1.27: A Redirect Can No Longer Switch Your Declarative Workflow to an Authenticated HttpClient

Microsoft Agent Framework for .NET 1.27.0 makes DefaultHttpRequestHandler throw HttpRequestException when its client-provider callback returns a client for a redirect destination. Here is why that hole existed, what breaks, and how to rewrite the callback.

2026-11-02 ai-agents claude-code subagents

A Coordinator Agent Plus Worker Agents for Multi-Day Projects

A coding agent loses its context every session, so a project that runs for days needs its memory in the repository. Make the coordinator a small script and a JSON ledger, run every worker as a fresh `claude -p` session in its own git worktree with a hard scope and budget, and have the coordinator verify and merge the work itself. Tested with a stub worker; flags pinned to Claude Code 2.1.310.

2026-11-02 migration flutter dart

Migrate a Flutter App from textScaleFactor to TextScaler (Flutter 3.16+)

Replace the deprecated textScaleFactor on MediaQueryData, Text, RichText and TextPainter with TextScaler. What dart fix rewrites (3 of 9 call sites in our sample), why its output can quietly undo Android 14 nonlinear font scaling, how to cap text size with clamp and withClampedTextScaling, and the equality and test gotchas. Measured on Flutter 3.44.8 with Dart 3.12.2.

2026-11-02 ef-core ef-core-11 dotnet-11

What Does EF Core Write Back Into an Entity After SaveChangesAsync?

After SaveChangesAsync, EF Core 11 copies store-generated keys, defaults, computed columns and concurrency tokens back into your entities, fixes up foreign keys and navigations, and resets every entry to Unchanged. Here is exactly what gets written, when, what the SQL looks like, and four cases where the value on your entity is not what is in the database.

2026-11-01 migration dotnet testing

Migrate a .NET test project from FluentAssertions 8 to AwesomeAssertions 9

A tested migration from FluentAssertions 8.11 to AwesomeAssertions 9.6 on .NET 10: the two-hop path through AwesomeAssertions 8.2, the License.Accepted compile error, the namespace rename, companion packages, and the silent DLL clash that can put the Xceed-licensed assembly back in your test run.

2026-11-01 migration dotnet testing

Migrate a .NET test project from Moq 4.21 to NSubstitute 6.2

A tested migration of an xUnit v3 test project on .NET 10 from Moq 4.21.0 to NSubstitute 6.2.0: the full API mapping table, out parameters, events, protected members, partial mocks, and four gotchas that a mechanical find-and-replace walks straight into.

2026-11-01 ai-agents llm anthropic-sdk

Retry and Backoff for Long Agent Loops Under Overloaded and Rate-Limit Errors

The Anthropic SDK retries a failed call twice in about 1.2 seconds, which is fine for a chat request and wrong for a 200-turn agent run. Classify every failure into retry-after, capacity, transient or terminal, retry the model turn (never the tool call), share one pause gate across workers, catch the mid-stream overloaded_error that arrives as a 200, and checkpoint so a dead run resumes. Tested against anthropic 2.3.0 for Python.

2026-10-31 comparison ai-agents claude-code

Fail-Closed vs Fail-Open Hooks for Coding Agent Guardrails: What Claude Code, Cursor, Copilot, Codex and Gemini CLI Actually Do

A guard hook that crashes or times out lets the dangerous command through in most coding agents. Fail closed for pre-action guards, fail open for everything else, and make the script fail closed by itself because Copilot, Codex and Gemini CLI treat a timeout as allow. Compared on Claude Code 2.1.295+, Cursor hooks, Copilot CLI 1.0.105, Codex and Gemini CLI, with a portable guard script.

2026-10-31 grpc aspnetcore dotnet

grpc-dotnet 2.85 Enforces MaxReceiveMessageSize After Decompression, Not Just Before

Grpc.AspNetCore and Grpc.Net.Client 2.85.0 now apply MaxReceiveMessageSize to the decompressed size of gzip and deflate messages. A 260 KB request that inflates to 256 MiB is rejected with ResourceExhausted, but legitimate large compressed payloads can start failing too.

2026-10-31 migration flutter android

Migrate a Flutter Android project's Gradle scripts from Groovy to Kotlin DSL (build.gradle to build.gradle.kts)

A tested, file-by-file conversion of a Flutter app's settings.gradle, build.gradle and app/build.gradle to Kotlin DSL on Flutter 3.44.8, AGP 9.0.1 and Gradle 9.1.0, with the real compiler errors each naive rename produces and the exact fix for signing configs, flavors, minifyEnabled and kotlinOptions.

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