using System;

class Program

{

    static string str = "Hello";

​

    static void Main(string[] args)

    {

        //Method level scope of variable declaration

        int a = 20;

        Console.WriteLine("a = {0}", a);

​

        //can access class level variables

        Console.WriteLine("str = {0}", str);

        Process();

        // Console.WriteLine("b = {0}", b); // can't access b

    }

​

    static void Process(){

        int b = 30;

        Console.WriteLine("b = {0}", b);

​

        //can access class level variables

        Console.WriteLine("str = {0}", str);

        // Console.WriteLine("a = {0}", a); // can't access a

    }

}