Challenges with Async/Await in ASP.NET Core 6 and Dependency Injection Initialization
I'm building a feature where I've been banging my head against this for hours. I tried several approaches but none seem to work. I've been banging my head against this for hours. I'm facing a challenge with asynchronous programming in my ASP.NET Core 6 application, particularly regarding the initialization of my services using Dependency Injection. I'm trying to use `async` methods in the constructor of my service class, which is generally not allowed. However, I want to perform some initialization that requires an asynchronous call to a database. I've set up my service like this: ```csharp public class MyService { private readonly IMyRepository _repository; public MyService(IMyRepository repository) { _repository = repository; // Cannot use async here InitializeAsync(); // This is not optimal } private async void InitializeAsync() { var data = await _repository.GetDataAsync(); // Perform some initialization logic with data } } ``` When I run the application, I notice that the `InitializeAsync` method does not complete before the rest of the application starts handling requests. This leads to null reference exceptions because my service isn't fully initialized when it's first accessed. I also get warnings about using `async void`, which I know is generally discouraged. I've tried to refactor my service to use a factory pattern where the factory creates the service instance after completing any asynchronous initialization: ```csharp public class MyServiceFactory { private readonly IMyRepository _repository; public MyServiceFactory(IMyRepository repository) { _repository = repository; } public async Task<MyService> CreateAsync() { var service = new MyService(_repository); await service.InitializeAsync(); return service; } } ``` But this approach complicates my DI setup and makes it harder to use `MyService` across my application. I am looking for a clean pattern to handle asynchronous initialization within an ASP.NET Core application while adhering to best practices. What would be an effective way to structure this to avoid these issues? Any ideas what could be causing this? This is part of a larger web app I'm building. How would you solve this? Thanks in advance! I'd be grateful for any help. For context: I'm using C# on macOS.