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Tag: dotnet

439 posts · Page 1 of 44

2026-10-16 dotnet logging observability

.NET Extensions 10.11: buffered logs can finally keep their scopes

Microsoft.Extensions.Telemetry 10.11.0, released October 15, 2026, adds an experimental IncludeScopes option to global and per-request log buffering, so OrderId and TenantId from BeginScope survive a Flush() instead of being silently dropped.

2026-10-15 dotnet tooling sdk

dotnetup public preview: one command installs the SDK your global.json pins

dotnetup went to public preview on October 15, 2026. Run dotnetup sdk install in a repo and it reads global.json, maps rollForward to an update channel, and can even write newer patch versions back to the file.

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 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.

2026-10-12 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.