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Tag: dotnet-10

88 posts · Page 2 of 9

2026-09-27 errors dotnet dotnet-10

Fix: MediaPicker.CapturePhotoAsync returns a PNG instead of a JPEG in .NET MAUI 10

On iOS, MAUI 10 re-encodes camera photos as PNG whenever CompressionQuality is 90 or higher and no MaximumWidth/Height is set, which includes the default. Set CompressionQuality to 89 or lower, or add a MaximumWidth on iOS only.

2026-09-25 errors aspnetcore dotnet-10

Fix: ASP.NET Core returns 400 "The X field is required" for a non-nullable string property

With <Nullable>enable</Nullable>, MVC treats every non-nullable reference type as [Required(AllowEmptyStrings = true)]. Mark optional properties as string?, give them a default, or set SuppressImplicitRequiredAttributeForNonNullableReferenceTypes.

2026-09-24 errors aspnet-core blazor

Fix: Conflicting assets with the same target path after upgrading to the .NET 10 SDK

On the .NET 10 SDK every Microsoft.NET.Sdk.Web project gets StaticWebAssetBasePath=/, so a web app referencing another web app collides. Set the base path on the referenced project. Disabling compression does not help.

2026-09-24 errors dotnet dotnet-10

Fix: HttpIOException: The response ended prematurely from HttpClient in .NET

HttpClient reuses a keep-alive connection the server just closed, or the server drops the connection mid-response. Lower PooledConnectionIdleTimeout below the server's idle timeout and retry only idempotent requests.

2026-09-24 errors blazor aspnetcore

Fix: Unable to find the required 'IAuthenticationService' service with [Authorize(Policy = ...)] in Blazor

A Blazor Web App page with [Authorize] becomes an endpoint the AuthorizationMiddleware checks, and a failed check calls ChallengeAsync, which needs AddAuthentication. Register a real scheme, or pass component endpoints through to AuthorizeRouteView.

2026-09-23 dotnet-10 httpclient resilience

Fix: custom DelegatingHandler does not run again on each retry with AddStandardResilienceHandler

A DelegatingHandler registered before AddStandardResilienceHandler runs once per logical request, not once per retry. Move it after the resilience handler, and make it idempotent, because the retry re-sends the same HttpRequestMessage. Measured on Microsoft.Extensions.Http.Resilience 10.10.0 and 8.10.0.

2026-09-23 dotnet-10 dotnet-11 configuration

Fix: IConfiguration.Bind does not populate an array or List<T> property from appsettings.json

The binder silently skips array properties without a public setter, get-only IReadOnlyList<T>, fields and init-only members under the source generator, and it appends to defaults instead of replacing them. Measured on .NET 10.0.12 and 11 RC 1.

2026-09-23 system-text-json csharp dotnet-10

How to serialize public fields like Vector3 and Quaternion with System.Text.Json

System.Text.Json writes Vector3 as {} and Quaternion as {"IsIdentity":false} because they store data in public fields. Here is how IncludeFields, a custom converter, a resolver modifier and source generation fix it, measured on .NET 10 and .NET 11 RC 1.

2026-09-21 aspnet-core dotnet-10 logging

How to add the current user id to every log entry in ASP.NET Core

A BeginScope middleware misses the exception handler's error log and the Request finished line. Register an ILogEnricher that reads the user from IHttpContextAccessor, open a scope only when work leaves the request, and watch out for Serilog's AddSerilog silently cancelling enrichment.

2026-09-21 ef-core ef-core-10 oracle

How to use an Oracle sequence to generate primary keys in EF Core

Map an EF Core key to an Oracle sequence with UseSequence in Oracle.EntityFrameworkCore 10: the DDL and INSERT SQL the provider really emits, how to point at an existing sequence or a legacy trigger, why quoting and HiLo trip people up, and how to move an identity column onto a sequence without ORA-00001.