using Microsoft.Extensions.DependencyInjection;
using System;

class Program
{
    static void Main()
    {
        var serviceProvider = new ServiceCollection()
            .AddSingleton()
            .BuildServiceProvider();

        var service = serviceProvider.GetService();
        service.Execute();
    }
}

public interface IService
{
    void Execute();
}

public class MyService : IService
{
    public void Execute()
    {
        Console.WriteLine("Service executed!");
    }
}