using System;

public class Program

{

​

    public static void Main()

    {

        new Test().Run();

    }

}

class Test{

    int X = 7;

    public void Run(){

        int X = 4;

        Console.WriteLine("X = " + X);

        Console.WriteLine("X = " + this.X); 

        Parameter(8);

    }

​

    public void Parameter(int X)

    {

            Console.WriteLine("Parameter X = " + X);

    }

}