ASP.NET Core 6: implementing Dependency Injection for a Scoped Service in a Singleton Context
After trying multiple solutions online, I still can't figure this out. I'm working on a project and hit a roadblock. I'm working with an scenario with dependency injection in my ASP.NET Core 6 application. I have a service that is registered as scoped, but I'm trying to use it within a singleton service. This is causing the following runtime exception: ``` InvalidOperationException: want to consume scoped service 'MyApp.Services.MyScopedService' from singleton 'MyApp.Services.MySingletonService'. ``` I've tried to resolve this by modifying the registration of my services in the `Startup.cs` file. Here’s how I have it set up: ```csharp public void ConfigureServices(IServiceCollection services) { services.AddScoped<MyScopedService>(); services.AddSingleton<MySingletonService>(); } ``` In `MySingletonService`, I need to use `MyScopedService`, but I understand that it's not directly possible. I've looked into creating a factory to resolve the scoped service through the `IServiceProvider`, but I'm unsure how to implement it correctly. I attempted the following approach: ```csharp public class MySingletonService { private readonly IServiceProvider _serviceProvider; public MySingletonService(IServiceProvider serviceProvider) { _serviceProvider = serviceProvider; } public void SomeMethod() { using (var scope = _serviceProvider.CreateScope()) { var scopedService = scope.ServiceProvider.GetRequiredService<MyScopedService>(); scopedService.DoSomething(); } } } ``` However, when I call `SomeMethod`, it seems to work, but I’m concerned about whether this is a best practice or if there are any potential performance implications. Is this an acceptable way to resolve scoped services from a singleton, or is there a better pattern I should be following? What are the consequences of this approach in terms of performance and resource management? What's the best practice here? For context: I'm using C# on Ubuntu.