using System;

using Microsoft.Extensions.DependencyInjection;

​

public class Manager

{

}

public class Program

{

    public static void Main()

    {

        ServiceCollection serviceCollection = new ServiceCollection();

        serviceCollection.AddSingleton<Manager>(); // Add it to the bucket of things I wanna use later

        ServiceProvider serviceProvider = serviceCollection.BuildServiceProvider();

        Manager myManager = serviceProvider.GetService<Manager>(); // I wanna use a Manager rn, give me one

    }

}