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Tag: dotnet-11

213 posts · Page 1 of 22

2026-07-27 csharp dotnet dotnet-11

How to diagnose a managed memory leak with dotnet-gcdump and dotnet-dump

A complete workflow for finding a managed memory leak in .NET 11: confirm growth with dotnet-counters, take two gcdumps and diff them, then collect a dump and use dumpheap, gcroot, and objsize in dotnet-dump analyze to find what is still holding the reference.

2026-07-27 dotnet dotnet-11 csharp

How to publish a .NET 11 app as a container image with dotnet publish /t:PublishContainer

A complete guide to building container images from a .NET 11 app with no Dockerfile: the PublishContainer target, ContainerRepository and ContainerImageTags, base image selection through ContainerBaseImage and ContainerFamily, pushing to a registry and how authentication resolves, multi-arch OCI image indexes, the non-root default user, entrypoint control, tarball output for scanners, and the cases where you still need a Dockerfile.

2026-07-27 csharp dotnet dotnet-11

How to serialize a polymorphic type hierarchy with JsonDerivedType in System.Text.Json

A complete guide to polymorphic JSON in .NET 11: JsonDerivedType and JsonPolymorphic, why the declared type decides everything, the $type ordering rule, every exception the feature throws, the contract model for types you do not own, and what ASP.NET Core emits in OpenAPI.

2026-07-26 aspire dotnet aspnetcore

How to add Aspire to an existing ASP.NET Core solution without restructuring it

Add Aspire 13.4 to a brownfield ASP.NET Core solution by adding two new projects and three lines per service: aspire init, AppHost wiring with AddProject and WithReference, keeping your existing launchSettings.json and connection strings, and the resilience, health-endpoint, and proxy gotchas that bite on day one.

2026-07-26 csharp dotnet dotnet-11

How to test time-dependent code with TimeProvider and FakeTimeProvider in .NET 11

Replace DateTime.UtcNow, Stopwatch, and Task.Delay with System.TimeProvider so tests can control the clock: DI registration, FakeTimeProvider.Advance and SetUtcNow, testing timeouts and PeriodicTimer-based BackgroundServices, plus the Advance-continuation and xUnit v2 gotchas.

2026-07-26 csharp dotnet dotnet-11

How to write integration tests with WebApplicationFactory<T> in ASP.NET Core 11

A complete guide to WebApplicationFactory<TEntryPoint> in ASP.NET Core 11: making the Program entry point reachable, ConfigureTestServices vs ConfigureWebHost, replacing the EF Core registration through IDbContextOptionsConfiguration, the new ConfigureHostApplicationBuilder hook in .NET 11 preview 6, faking authentication, WebApplicationFactoryClientOptions, and UseKestrel when you need a real port.

2026-07-25 migration csharp dotnet

Migrate from blocking .Result/.Wait() calls to async all the way up in a legacy C# codebase

A staged playbook for removing sync-over-async from an existing .NET codebase: inventory with analyzers, measure ThreadPool starvation, convert one call chain at a time, and ratchet the count to zero on .NET 11.

2026-07-25 migration dotnet dotnet-11

Migrate from ILogger string interpolation to structured logging message templates in .NET 11

A step-by-step guide to converting $-interpolated ILogger calls into message templates and [LoggerMessage] source-generated methods on .NET 11: what breaks, how to sweep a codebase with CA2254, how to verify the JSON state, and how to roll back.

2026-07-24 comparison csharp dotnet

Endpoint filters vs middleware in ASP.NET Core 11: which should you use?

A decision guide for ASP.NET Core 11: middleware runs for every request before your handler binds, endpoint filters run only for the matched endpoint after binding and can see the typed arguments. Includes a feature matrix, when-to-pick-each scenarios, the ordering rules, and the gotchas that force the choice.

2026-07-24 migration swashbuckle openapi

Migrate Swashbuckle IOperationFilter and ISchemaFilter to OpenAPI transformers in .NET 11

A filter-by-filter porting reference for moving Swashbuckle IOperationFilter and ISchemaFilter code to the built-in operation and schema transformers in .NET 11, with the context-object field mapping and the Microsoft.OpenApi v2 changes that bite.