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Tag: dotnet

442 posts · Page 2 of 45

2026-10-12 errors dotnet dotnet-10

Fix: Settings file 'DotnetToolSettings.xml' was not found in the package

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.

2026-10-12 fluentvalidation native-aot dotnet

FluentValidation 12.2 fixes IsInEnum() crashing native AOT apps on [Flags] enums

FluentValidation 12.2.0, released October 10, 2026, swaps Enum.GetValues for Enum.GetValuesAsUnderlyingType inside EnumValidator, so IsInEnum() on a [Flags] enum no longer throws NotSupportedException in a native AOT binary.

2026-10-11 csharp dotnet file-io

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.

2026-10-11 quartz-net dotnet csharp

Quartz.NET 4.4: Jobs Report What They Achieved, and a Health Check Notices When They Stop

Quartz.NET 4.4.0 lets a job set context.Result to a JobRunReport (Succeeded, Failed, Cancelled or Skipped, with a summary and metrics), keeps that per job in the execution history, and adds RequireSuccessWithin health checks that degrade when a nightly job stops succeeding.

2026-10-10 dotnet dotnet-11 csharp

How to Match Nested Parentheses and Balanced Tags with Balancing Groups in .NET Regex

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.

2026-10-10 microsoft-agent-framework ai-agents llm

What Is Magentic Orchestration in Microsoft Agent Framework

Magentic orchestration is Agent Framework's port of AutoGen's Magentic-One: an LLM manager writes a fact sheet and plan (the task ledger), then grades every round with a JSON progress ledger to pick the next agent, detect stalls and replan. Here is how the loop works on Microsoft.Agents.AI.Workflows 1.24.0 and agent-framework-orchestrations 1.3.1, what it costs per round, and the limit defaults that let it run forever.

2026-10-09 dotnet semantic-kernel ai-agents

Semantic Kernel 1.81 Stops FileIOPlugin From Leaking Files Outside AllowedFolders

Semantic Kernel .NET 1.81.0 fixes a FileIOPlugin oracle: WriteAsync told the model a file outside AllowedFolders existed, was read-only, and where it lived. Measured before and after.

2026-10-08 comparison ef-core dotnet

AddDbContextPool vs AddDbContextFactory for running EF Core queries in parallel

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.

2026-10-08 agent-framework dotnet anthropic

Agent Framework 1.24: The Anthropic Agent Package Is Stable, Except for Beta Services

Microsoft.Agents.AI.Anthropic 1.24.0 drops the preview suffix and depends on Anthropic 12.53.0. Agents built from IAnthropicClient are now stable API, while the client.Beta extensions are marked experimental under MAAIANTHROPIC001, which extension-method calls do not trigger.

2026-10-07 errors dotnet testing

Fix: dotnet test falls back to VSTest in a Linux CI pipeline even though the project uses Microsoft.Testing.Platform

dotnet test picks its runner from global.json found by walking up from the working directory. On Linux CI it falls back to VSTest when that file is missing, misnamed, has a mis-cased key, or the SDK is older than 10.