C# - Issue with Dependency Injection in ASP.NET Core 6 Causing NullReferenceException on Scoped Services
After trying multiple solutions online, I still can't figure this out... I'm facing a frustrating issue with dependency injection in my ASP.NET Core 6 application. I have a service `MyService` that depends on another service `IDataRepository`, which is registered as scoped. When I try to resolve `MyService` in my controller, I receive a `NullReferenceException` when accessing `IDataRepository` in `MyService`'s methods. Here’s the relevant code snippet: ```csharp public class MyService : IMyService { private readonly IDataRepository _dataRepository; public MyService(IDataRepository dataRepository) { _dataRepository = dataRepository; } public void DoSomething() { var data = _dataRepository.GetData(); // NullReferenceException occurs here } } ``` Here’s how I have set up the services in `Startup.cs`: ```csharp public void ConfigureServices(IServiceCollection services) { services.AddScoped<IDataRepository, DataRepository>(); services.AddScoped<IMyService, MyService>(); } ``` And the controller looks like this: ```csharp [ApiController] [Route("api/[controller]")] public class MyController : ControllerBase { private readonly IMyService _myService; public MyController(IMyService myService) { _myService = myService; } [HttpGet] public IActionResult Get() { _myService.DoSomething(); // This call leads to NullReferenceException return Ok(); } } ``` I've double-checked that `IDataRepository` and `DataRepository` are correctly implemented and that the dependency injection is wired up properly. The `NullReferenceException` suggests that `_dataRepository` is not being instantiated, which seems odd given that it's registered as scoped. Could there be an issue with the way I'm resolving my dependencies, or is there a common mistake that I might be overlooking? Any insights would be greatly appreciated! What am I doing wrong?