.NET Core Singleton Creation is called multiple times

Question

I\'m registering a service as a singleton in .NET Core. Yet I\'m seeing the constructor for the singleton called multiple times.

services.AddSingleton

        

Answer 1

You can declare a dependency on IServiceProvider -- don't build it, inject it.

public class SomeController
{
    DbAuthorizationOptions authOptions;
    public SomeController(IServiceProvider provider)
    {
        authOptions = provider.GetSerivce();
    }
}

But this is the service locator anti-pattern. As I commented on NightOwl888's post after you gave more details, a factory is probably a better approach.