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Tag: dotnet-11

269 posts · Page 8 of 27

2026-07-22 comparison complex-types owned-entities

Complex types vs owned entities in EF Core 11: which should you pick?

On EF Core 11, default to complex types for value objects and drop to owned entities only when you need a separate table or a collection mapped to its own rows.

2026-07-22 comparison aspnetcore dotnet-11

Output caching vs response caching in ASP.NET Core 11: which should you use?

Output caching is the right default for almost every server-side app in ASP.NET Core 11. Response caching only wins when your goal is to steer browser and proxy caches through HTTP headers. Here is the decision, with a feature matrix and the gotchas that force the call.

2026-07-22 comparison ef-core ef-core-11

TPH vs TPT vs TPC inheritance mapping in EF Core 11: which should you pick?

On EF Core 11, default to TPH for almost every hierarchy, reach for TPC only when you mostly query one leaf type and a benchmark proves it wins, and use TPT only when an external constraint forces you to.

2026-07-21 errors csharp csharp-14

Fix: CS4014 "Because this call is not awaited, execution of the current method continues" in C#

CS4014 means you called a Task-returning method without awaiting it. Add await, or discard with _ = if fire-and-forget is truly intended, and handle exceptions.

2026-07-21 errors csharp dotnet

Fix: System.InvalidOperationException: Sequence contains no elements

This exception means you called .First() or .Single() on an empty sequence. Use FirstOrDefault/SingleOrDefault and null-check, or guard the query, or fix why the source is empty.

2026-07-21 csharp dotnet-11 system-text-json

System.Text.Json Learns to Serialize C# Union Types in .NET 11 Preview 6

How System.Text.Json in .NET 11 Preview 6 serializes the new C# union types by writing the active case, and the JsonUnionAttribute and type-classifier APIs that handle ambiguous cases.

2026-07-20 aspnetcore dotnet-11 validation

Async validation lands in Minimal APIs with .NET 11 Preview 6

Preview 6 adds AsyncValidationAttribute and IAsyncValidatableObject so DataAnnotations rules can hit the database before your endpoint runs, without blocking a thread.

2026-07-20 errors csharp csharp-14

Fix: CS8618 "Non-nullable property must contain a non-null value when exiting constructor" in C#

CS8618 means a non-nullable field or property was not initialized by the time the constructor finished. Set it in the constructor, give it a default, mark it required, or make it nullable.

2026-07-20 csharp dotnet dotnet-11

Fix: deadlock when calling .Result or .Wait() on an async method in C#

Blocking on an async Task with .Result or .Wait() deadlocks when a SynchronizationContext is present. Here is why it hangs and how to fix it in .NET 11 and C# 14.

2026-07-19 csharp dotnet dotnet-11

How to add a health check endpoint to a minimal API in ASP.NET Core 11

A complete, working guide to health checks in an ASP.NET Core 11 minimal API: AddHealthChecks and MapHealthChecks, custom IHealthCheck classes returning Healthy/Degraded/Unhealthy, the AddDbContextCheck EF Core probe, tag-based liveness and readiness endpoints for Kubernetes, a JSON ResponseWriter, ResultStatusCodes, securing the endpoint with RequireAuthorization and RequireHost, and pushing results with IHealthCheckPublisher.