Unexpected Behavior with Dependency Injection in .NET 7 When Scoping Services
I'm following best practices but I'm using .NET 7 with ASP.NET Core, and I've run into a puzzling issue regarding service lifetimes and dependency injection. I've registered a service, `IMyService`, with a scoped lifetime in my `Startup.cs`, but when I try to resolve it inside a controller, I'm getting an instance that doesn't seem to hold the expected state. Here's how I've registered my service: ```csharp services.AddScoped<IMyService, MyService>(); ``` And in my controller, I'm injecting it like this: ```csharp public class MyController : ControllerBase { private readonly IMyService _myService; public MyController(IMyService myService) { _myService = myService; } [HttpGet] public IActionResult Get() { _myService.SetValue("Hello"); return Ok(_myService.GetValue()); } } ``` The `SetValue` method sets a string property on `MyService`. However, when I make multiple requests to the `Get` endpoint, I notice that the value doesn't persist across requests, and I get 'null' instead of 'Hello' on subsequent calls. I verified that there's no singleton service involved, and the `IMyService` is scoped correctly. I also checked that I'm not accidentally creating new instances manually like this: ```csharp var service = new MyService(); // This would be incorrect ``` I've added logging in the constructor of `MyService` to confirm that a new instance is created with each request, but I expected it to reuse the same instance for each request within the same scope. Has anyone encountered a similar issue? Is there a best practice I'm missing here that's causing my service to be instantiated fresh with every request? This is for a mobile app running on CentOS. Any advice would be much appreciated.