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296 posts · Page 9 of 30

2026-06-10 errors csharp dotnet

Fix: The configured execution strategy 'SqlServerRetryingExecutionStrategy' does not support user-initiated transactions

EnableRetryOnFailure conflicts with BeginTransaction. Wrap the whole transaction in db.Database.CreateExecutionStrategy().ExecuteAsync(...) so it retries as one unit.

2026-06-09 errors blazor dotnet

Fix: its render mode is not supported by the parent component's render mode (Blazor)

You put @rendermode on a child whose parent is already interactive. A subtree has exactly one render mode. Remove the child directive or move it to the boundary.

2026-06-08 csharp dotnet dotnet-11

How to expose OpenAPI without Swashbuckle in ASP.NET Core 11

Swashbuckle is gone from the ASP.NET Core templates. Here is how to generate and serve an OpenAPI document in .NET 11 with the built-in Microsoft.AspNetCore.OpenApi package: AddOpenApi, MapOpenApi, transformers, multiple documents, build-time generation, and a UI on top.

2026-06-08 dotnet efcore csharp

How to use EF Core 11 interceptors for auditing

Stamp CreatedBy/ModifiedOn columns and write a full change-trail with an ISaveChangesInterceptor in EF Core 11, including the DI lifetime, current-user, and ExecuteUpdate gotchas.

2026-06-07 github-copilot copilot-sdk ai-agents

GitHub Copilot SDK Hits GA: Embed Copilot's Agent Runtime in Your Own C# Apps

At Build 2026 GitHub shipped Copilot SDK 1.0 GA with a first-class .NET package. You can now drive the same planning, tool-calling, and multi-turn agent runtime from C# code, BYOK included.

2026-06-07 csharp dotnet dotnet-11

How to organize minimal API endpoints with MapGroup in ASP.NET Core 11

A complete guide to structuring minimal APIs in ASP.NET Core 11 with MapGroup: per-resource endpoint modules as extension methods, nested groups, shared filters and auth, route-parameter prefixes, OpenAPI tags, and the filter-ordering rules that surprise people.

2026-06-07 aspnetcore dotnet performance

How to use HybridCache in ASP.NET Core 11 with Redis as the L2 cache

Wire HybridCache to a Redis L2 in ASP.NET Core 11: register the service, add the StackExchange Redis distributed cache, and let GetOrCreateAsync give you a two-tier cache with built-in stampede protection and tag invalidation.

2026-06-07 csharp dotnet dotnet-11

How to validate request bodies in minimal APIs without controllers in ASP.NET Core 11

ASP.NET Core 11 has built-in validation for minimal APIs: call AddValidation, annotate your request record with DataAnnotations, and a source generator validates the bound model and returns 400 ProblemDetails before your handler runs. No controllers, no FluentValidation, no manual checks.

2026-06-06 dotnet dotnet-11 opentelemetry

.NET 11 Gives MemoryCache First-Class OpenTelemetry Metrics

.NET 11 Preview 4 ships a built-in meter for Microsoft.Extensions.Caching.Memory, so cache hit ratio and evictions flow into OpenTelemetry without a background poller.

2026-06-06 comparison microsoft-agent-framework semantic-kernel

Microsoft Agent Framework vs Semantic Kernel for a Greenfield .NET Agent

For a new .NET agent in 2026, start on Microsoft Agent Framework 1.0. Semantic Kernel is in maintenance mode. Here is the side-by-side and the one case where SK still wins.