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Tag: csharp

187 posts · Page 2 of 19

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 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 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.

2026-06-06 migration csharp dotnet

Migrate from ValueTask<T> back to Task<T>: when and why (.NET 11, C# 14)

A practical checklist for reverting ValueTask and ValueTask<T> return types to Task and Task<T>, what breaks at the call sites, how to verify each change, and how to know whether the swap was ever worth it.

2026-06-05 migration blazor dotnet

Migrate a Blazor Server app to Blazor United (Blazor Web App) in .NET 11

A step-by-step checklist to move a standalone Blazor Server app to the unified Blazor Web App template on .NET 11, keeping every page on InteractiveServer with zero behaviour change.

2026-06-05 migration azure-functions dotnet

Migrate from in-process Azure Functions to the isolated worker model (.NET 8 / .NET 11)

A step-by-step checklist to move a .NET in-process Azure Functions app to the isolated worker model before the November 10, 2026 retirement, with csproj diffs, signature rewrites, and a slot-swap rollout.

2026-06-04 comparison ef-core ef-core-11

EF Core ExecuteUpdate vs loading entities and SaveChanges: which should you use?

A decision guide and real benchmark for EF Core 11: use ExecuteUpdate for set-based writes by a predicate, and the load-then-SaveChanges path only when you need the change tracker, interceptors, or a complex object graph.

2026-06-02 dotnet-11 csharp performance

.NET 11 Can Round-Trip a Double as Hex, Bit for Bit

.NET 11 Preview 4 teaches double, float, and Half to format with the X specifier and parse with NumberStyles.HexFloat, producing the same IEEE-754 hex text as C printf("%a").

2026-06-02 errors csharp dotnet

Fix: ObjectDisposedException: Cannot access a disposed context instance

Your fire-and-forget task captured a request-scoped DbContext that the DI scope already disposed. Resolve a fresh context inside the task with IServiceScopeFactory or IDbContextFactory.

2026-06-01 ef-core dotnet-11 dotnet-cli

EF Core 11 Preview 4: Stop Retyping --project and --startup-project with .config/dotnet-ef.json

EF Core 11 Preview 4 lets the dotnet ef tool read default option values from a .config/dotnet-ef.json file, so split solutions no longer force you to pass --project and --startup-project on every command.