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Tag: async

37 posts · Page 1 of 4

2026-10-29 blazor mudblazor aspnet-core

MudBlazor 9.12: Slow ServerData and Autocomplete Searches No Longer Overwrite Newer Results

MudBlazor 9.12.0 fixes a long-standing race in MudAutocomplete, MudDataGrid and MudTable: the result of the search that finished last used to win, not the one started last. Here is how the fix works and what changes for your ServerData and SearchFunc code.

2026-10-22 comparison dart flutter

unawaited_futures vs discarded_futures in Dart: which lint catches which un-awaited call

unawaited_futures only looks inside async bodies, discarded_futures only inside sync bodies, and both miss arrow functions, tear-offs, and collection literals. Measured case by case on Dart 3.12.2 and Flutter 3.44.8, with the analysis_options.yaml I recommend.

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.

2026-10-11 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.

2026-10-03 csharp dotnet async

How to wait for a ValueTask synchronously in a non-async method without allocating

Check IsCompleted first and read the result through GetAwaiter().GetResult(), which costs 0 bytes. Only fall back to blocking when the ValueTask is still pending, and do that with a cached event and UnsafeOnCompleted instead of AsTask(), which allocates 72 to 208 bytes per call. Measured on .NET 10 and .NET 11 RC1.

2026-09-16 errors dotnet dotnet-10

Fix: UIKitThreadAccessException from MediaPicker.PickPhotosAsync when selecting multiple photos in .NET MAUI iOS

Picking 2 or more photos on iOS throws UIKitThreadAccessException in MAUI 10.0.100 and 10.0.101. MAUI reads PHPickerResult.ItemProvider after an await, off the main thread. Pin 10.0.90, upgrade to 10.0.110, or use a PHPicker shim.

2026-09-14 dotnet-11 dotnet csharp

How to Create and Extract ZIP Files Asynchronously with the ZipArchive Async APIs in .NET 11

Use ZipFile.CreateFromDirectoryAsync, ExtractToDirectoryAsync, ZipArchive.CreateAsync and ZipArchiveEntry.OpenAsync without hidden synchronous I/O. Measured on .NET 11 RC 1 and .NET 10.0.12, including the .NET 10 bug that still blocks Kestrel.

2026-09-07 dotnet dotnet-11 csharp

How to find the async void handlers causing ANRs in a .NET MAUI Android app

Play Console tells you your ANR rate is over 0.47% and hands you a native stack full of libcoreclr.so frames. Here is how to get from that useless trace to the exact async void event handler that blocked the main thread, using a Looper printer, a SynchronizationContext wrapper that names the state machine, and dotnet-trace over dsrouter.

2026-09-01 comparison csharp csharp-14

Returning a Task directly vs async/await passthrough in a C# repository method: which should you use?

Eliding async/await in a repository passthrough saves about 6 ns and 72 bytes, and costs you a stack frame, try/catch semantics, and safe disposal. Keep return await unless the method is a pure passthrough on a measured hot path.

2026-08-05 errors csharp dotnet

Fix: AggregateException "One or more errors occurred" when awaiting Task.WhenAll in C#

await Task.WhenAll rethrows only one of the failures. Keep the WhenAll task in a variable and read its Exception.InnerExceptions to see every error instead of one.