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Tag: dotnet

345 posts · Page 1 of 35

2026-08-18 errors dotnet csharp

Fix: 'MapperConfiguration' does not contain a constructor that takes 1 arguments

AutoMapper 15 removed the single-argument MapperConfiguration constructor. Pass an ILoggerFactory as the second argument, and add a config action to every AddAutoMapper call.

2026-08-17 dotnet logging security

How to redact sensitive values from logs with LogProperties and data redaction in .NET

A complete guide to redacting classified data in source-generated logs: build a taxonomy, write a Redactor, wire EnableRedaction and AddRedaction, and understand the discriminator that silently breaks partial masking. With real output from Microsoft.Extensions.Compliance.Redaction 10.9.0.

2026-08-16 csharp dotnet dotnet-11

How to download a file from a Blazor component without JavaScript interop

Skip the downloadFileFromStream JS module entirely. Render an anchor with the download attribute pointing at a minimal API endpoint that returns TypedResults.File, or POST a plain HTML form with an AntiforgeryToken. Covers why the download attribute is what stops Blazor's enhanced navigation from swallowing the click, why data-enhance silently discards the file, and the cookie-vs-bearer auth trap.

2026-08-16 csharp dotnet dotnet-11

How to use IDbContextFactory<T> from a singleton service in Blazor

A singleton cannot inject a DbContext, but it can inject IDbContextFactory<T>, because AddDbContextFactory registers the factory as a singleton by default. Create and dispose one context per call, never cache the instance.

2026-08-15 dotnet-11 dotnet csharp

System.IO.Compression Finally Reads and Writes Encrypted ZIPs in .NET 11 Preview 7

.NET 11 Preview 7 adds password-protected ZIP entries to System.IO.Compression, with AES-256 support, options types for whole-directory operations, and one empty-file bug that is already fixed in main.

2026-08-15 comparison csharp dotnet

Scalar vs Swagger UI for OpenAPI documentation in ASP.NET Core 11

Scalar ships 1.02 MiB of gzipped JavaScript and a far better request builder. Swagger UI ships 514 KiB and renders OpenAPI 3.2, which is what .NET 11 now emits by default. Measured payloads, the 3.2 gap, endpoint routing on both sides, and the auth details that decide it.

2026-08-15 comparison dotnet dotnet-11

Zstandard vs Brotli vs Gzip response compression in .NET 11

Zstandard is the right default for dynamic API responses in .NET 11, but not at the quality the ASP.NET Core provider ships with. Benchmarks on real JSON payloads showing why quality 1 beats the default quality 3 on both size and CPU, when Brotli still wins, and why Gzip survives only as a fallback.

2026-08-14 errors flutter maui

Fix: Google Play rejects a Flutter or .NET MAUI app for missing 16 KB memory page size support

Play rejects the bundle because a 64-bit .so still has 4 KB ELF segments. Find the offending library, rebuild it with NDK r28+, and verify with zipalign -P 16.

2026-08-14 dotnet ai microsoft-extensions-ai

Microsoft.Extensions.AI 10.9 Ships Routing and Failover Chat Clients

Microsoft.Extensions.AI 10.9.0 adds RoutingChatClient, OrderedFailoverChatClient, and SemanticRoutingChatClient. Verified against the real package: what fails over, what does not, and why MEAI001 breaks your build.

2026-08-13 errors dotnet testing

Fix: Visual Studio Test Explorer hangs on an xUnit v3 project while dotnet test passes

Test Explorer drives xUnit v3 through Microsoft.Testing.Platform server mode over a JSON-RPC socket, dotnet test does not. Set UseMicrosoftTestingPlatformRunner so both paths are the same code, or set DisableTestingPlatformServerCapability to fall back to VSTest.