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Tag: csharp

300 posts · Page 5 of 30

2026-07-29 mcp dotnet csharp

MCP C# SDK 2.0 Ships: Stateless by Default and MCP9005 on Your Old Code

ModelContextProtocol 2.0.0 landed on 2026-07-28 with the stateless HTTP transport on by default, Multi Round-Trip Requests replacing server-initiated elicitation, and an analyzer warning on ElicitAsync and SampleAsync.

2026-07-28 ef-core ef-core-11 dotnet

How to apply EF Core 11 migrations in production with dotnet ef migrations bundle

A complete guide to deploying EF Core 11 schema changes with migration bundles: building efbundle in CI, the appsettings.json trap with named connection strings, self-contained bundles and the Alpine musl RID, migration locking since EF Core 9, rolling back with a target migration, and why per-migration transactions do not save you on MySQL.

2026-07-28 maui dotnet-maui dotnet-11

How to use Shell route parameters and query properties for navigation in .NET MAUI 11

A complete guide to passing data through Shell navigation in .NET MAUI 11: registering global routes, string query parameters, QueryPropertyAttribute vs IQueryAttributable, the URL-decoding asymmetry between the two, single-use ShellNavigationQueryParameters vs the IDictionary overload that leaks, passing data backwards with ..?key=value, and why QueryPropertyAttribute is not trim safe.

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 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 microsoft-agent-framework ai-agents dotnet

Agent Framework Declarative Workflows 1.0: Your Orchestration Graph Is Now a YAML File

Microsoft Agent Framework shipped Declarative Workflows 1.0 on July 23, 2026. Python's agent-framework-declarative 1.0.0 reaches parity with the .NET Microsoft.Agents.AI.Workflows.Declarative package, so multi-agent routing lives in YAML instead of C#.

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.