Start Debugging

Tag: dotnet-11

270 posts · Page 14 of 27

2026-06-14 dotnet dotnet-11 ef-core

EF Core 11's New EF1004 Analyzer Catches a Silent Async Mistake

EF Core 11 Preview 5 ships the EF1004 analyzer. It flags ToAsyncEnumerable() on an IQueryable so you do not accidentally enumerate a database query synchronously inside an await foreach.

2026-06-13 dotnet-11 csharp cryptography

X25519 Key Agreement Lands In-Box in .NET 11 Preview 5

.NET 11 Preview 5 adds a first-class X25519DiffieHellman type to System.Security.Cryptography, so you can do Curve25519 key exchange without BouncyCastle or NSec.

2026-06-12 errors csharp dotnet

Fix: The entity type 'X' requires a primary key to be defined in EF Core 11

EF Core can't find a key for your type. Either name a property Id or {Type}Id, add [Key], call HasKey, or - if it is a view or raw SQL result - call HasNoKey.

2026-06-12 dotnet-11 csharp linq

LINQ Gets FullJoin and Selector-Free Joins in .NET 11 Preview 5

.NET 11 Preview 5 adds a brand-new FullJoin operator to LINQ plus tuple-returning overloads for Join, LeftJoin, RightJoin, and GroupJoin that drop the result selector entirely.

2026-06-11 blazor dotnet-11 aspnetcore

Blazor static SSR forms get client-side validation in .NET 11 Preview 5

Static server-rendered Blazor forms could only validate after a full POST round-trip. .NET 11 Preview 5 renders validation metadata so the Blazor JS enforces DataAnnotations rules in the browser, no circuit required.

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.

2026-06-10 dotnet-11 csharp system-text-json

System.Text.Json Finally Writes JSON Lines in .NET 11 Preview 5

.NET 11 Preview 5 adds JsonSerializer.SerializeAsyncEnumerable with topLevelValues: true, so System.Text.Json can now stream JSONL out, not just read it.

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.

2026-06-09 blazor dotnet-11 aspnetcore

How to persist state across the Blazor static-to-interactive render boundary in .NET 11

A prerendered Blazor component runs its initialization twice and loses state at the interactive handoff. Fix it with the [PersistentState] attribute or the PersistentComponentState service in .NET 11.

2026-06-08 llm ai-agents anthropic-sdk

Anthropic SDK vs Microsoft.Extensions.AI for Calling Claude From .NET

Two ways to call Claude from C#: the official Anthropic .NET SDK directly, or the provider-neutral Microsoft.Extensions.AI IChatClient that wraps it. When each wins, what you lose at the abstraction boundary, and why it is not actually either/or. With claude-opus-4-8 and claude-sonnet-4-6 examples.