Start Debugging

Tag: csharp

243 posts · Page 1 of 25

2026-07-21 comparison microsoft-agent-framework ai-agents

Microsoft Agent Framework orchestration: sequential vs concurrent vs group chat vs handoff vs magentic

Sequential for pipelines, concurrent for fan-out, group chat for moderated rounds, handoff for routing, magentic for open-ended planning. The C# builders and how to choose.

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.

2026-07-19 csharp dotnet dotnet-11

How to add an endpoint filter to a minimal API in ASP.NET Core 11

A complete, working guide to endpoint filters in an ASP.NET Core 11 minimal API: AddEndpointFilter with an inline delegate, IEndpointFilter classes with DI, GetArgument and the Arguments list, short-circuiting with Results.Problem, FIFO/FILO ordering across multiple filters, group-level filters on MapGroup, and AddEndpointFilterFactory for signature-aware filters.

2026-07-19 ef-core dotnet csharp

How to log the SQL that EF Core 11 generates

See the exact SQL Entity Framework Core 11 sends to your database, with parameter values, using LogTo, Microsoft.Extensions.Logging, and ToQueryString.