using System;

​

public class Program

{

    static ILog Log = new Logger(nameof(Program));

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Log.message();

    }

}

​

interface ILog

{

    void message();

}

​

class Logger : ILog

{

    string className;

    public Logger(string loggerName)

    {

        className = loggerName;

    }

​

    public void message()

    {

        Console.WriteLine($"instance call from {className}");

    }

}

​

class Log

{

    public static void message()

    {

        Console.WriteLine("static call");

    }

}