.NET 11 Can Round-Trip a Double as Hex, Bit for Bit
.NET 11 Preview 4 teaches double, float, and Half to format with the X specifier and parse with NumberStyles.HexFloat, producing the same IEEE-754 hex text as C printf("%a").
Tag: dotnet-11
270 posts · Page 16 of 27
Fix: ObjectDisposedException: Cannot access a disposed context instance
Your fire-and-forget task captured a request-scoped DbContext that the DI scope already disposed. Resolve a fresh context inside the task with IServiceScopeFactory or IDbContextFactory.
EF Core 11 Preview 4: Stop Retyping --project and --startup-project with .config/dotnet-ef.json
EF Core 11 Preview 4 lets the dotnet ef tool read default option values from a .config/dotnet-ef.json file, so split solutions no longer force you to pass --project and --startup-project on every command.
How to use query splitting to avoid a cartesian explosion in EF Core 11
When you Include two sibling collections, EF Core 11 returns the cross product and your row count explodes. Here is how AsSplitQuery fixes it, how to turn it on globally, and the consistency and ordering gotchas to watch for.
How to run fire-and-forget work safely in ASP.NET Core with BackgroundService
Calling Task.Run from a controller loses work on shutdown, swallows exceptions, and captures disposed scoped services. The safe pattern is a bounded Channel queue drained by a BackgroundService that opens a fresh scope per work item and drains in-flight work on StopAsync.
How to use ExecuteUpdate and ExecuteDelete for bulk writes in EF Core 11
A complete guide to ExecuteUpdate and ExecuteDelete in EF Core 11: the SQL they emit, the change-tracker gotcha that silently overwrites your bulk write, transactions, concurrency control with the affected-row count, and the EF Core 10 delegate setters that let you build conditional updates with plain if statements.
How to use scoped services inside a BackgroundService in ASP.NET Core 11
A BackgroundService is a singleton, so it cannot inject a scoped service like a DbContext directly. Take IServiceScopeFactory, open one scope per unit of work with CreateAsyncScope, resolve inside it, and dispose it when the work is done.
Migrate from AutoMapper to source-generated mapping with Mapperly
A step-by-step checklist to replace AutoMapper 15 Profiles, IMapper, ForMember, and ProjectTo with Riok.Mapperly 4.3 source-generated mappers in .NET 11.
Migrate from MediatR to plain dependency injection in .NET 11
A step-by-step checklist to remove MediatR 12-14 and replace IRequest handlers, ISender, pipeline behaviors, and INotification with plain service classes and constructor injection.
Migrate from Newtonsoft.Json 13 to System.Text.Json in a large .NET 11 codebase
A version-pinned playbook for swapping Newtonsoft.Json 13.0.4 for the in-box System.Text.Json on .NET 11: the attribute and settings mappings, the defaults that silently change your wire format, a staged rollout strategy, verification, and the gotchas that bite large codebases.