How to handle circular dependency in Azure Functions using Dependency Injection?
I'm working on a personal project and After trying multiple solutions online, I still can't figure this out. I'm stuck on something that should probably be simple. I'm working on an Azure Functions project using .NET 6, where I am trying to implement Dependency Injection (DI) for better modularity and testability. However, I have run into a circular dependency scenario between two services. Here’s a simplified version of what I have: ```csharp public class ServiceA : IServiceA { private readonly IServiceB _serviceB; public ServiceA(IServiceB serviceB) { _serviceB = serviceB; } } public class ServiceB : IServiceB { private readonly IServiceA _serviceA; public ServiceB(IServiceA serviceA) { _serviceA = serviceA; } } ``` When I try to run my function app, I get the following behavior: `Unable to resolve service for type 'IServiceA' while attempting to activate 'ServiceA'.` I’ve tried breaking the dependency by introducing a third service and modifying the constructors, but that hasn’t worked effectively. Here’s how I registered my services in the `Startup.cs`: ```csharp public override void Configure(IFunctionsHostBuilder builder) { builder.Services.AddSingleton<IServiceA, ServiceA>(); builder.Services.AddSingleton<IServiceB, ServiceB>(); } ``` I’m looking for a way to resolve this circular dependency while still keeping the services decoupled. Is there a best practice or a design pattern that I should follow to avoid these kinds of situations in Azure Functions? Any help would be greatly appreciated! I'd really appreciate any guidance on this. Any ideas how to fix this? I'm working in a CentOS environment. Any examples would be super helpful.