using System;

​

using Microsoft.Extensions.DependencyInjection;

public class Program

{

    public static void Main()

    {

        var services = new ServiceCollection();

        services.AddSingleton<MyService>();

        services.AddSingleton<MyDependency>();

        using var serviceProvider = services.BuildServiceProvider();

        var myService = serviceProvider.GetRequiredService<MyService>();

        myService.DoTheThing();

    }

}

​

public class MyService(

    MyDependency _myDependency)

{

    public void DoTheThing() =>

        Console.WriteLine("Hello World!");

}

​

public class MyDependency

{

}