using System;

public class Program

{

    //local variable

    int mathMark = 0;

    //instance variable

    int x = 7;

    //static variable

    static int y = 27;

    //constant variable

    const int z = 32;

    //readonly variable

    readonly int v; 

    //main method(main function) begins

    public static void Main()

    {

        Program obj1 = new Program();

        Console.WriteLine("This is a local variable: " + obj1.mathMark);

        Console.WriteLine(" ");

        Console.WriteLine("This is an instance variable: " + obj1.x);

        Console.WriteLine(" ");

        Console.WriteLine("This is a static variable: " + Program.y);

        Console.WriteLine(" ");

        Console.WriteLine("This is a constant variable: " + Program.z);

        Console.WriteLine(" ");

        Console.WriteLine("This is a readonly variable: " + obj1.v);

    }

}

​

/* Always remember instance variables are called using objects; 

   While static and constant variables are called using the name of the class

*/