using System;

​

public class LocalVariableDemo

{

    public static void Main()

    {

        ShowWelcomeMessage();

        int a = 12;

        Console.WriteLine("In Main a is {0}", a);

        MethodWithItsOwnA();

        Console.WriteLine("In Main() a is {0}", a);

        Console.WriteLine(AddNumber(1, 2));

    }

​

    private static void ShowWelcomeMessage()

    {

        Console.WriteLine("hello world!");

    }

​

    private static void MethodWithItsOwnA()

    {

        int intA = 345;

        Console.WriteLine("In method a is {0}", intA);

    }

​

    public static int AddNumber(int a, int b)

    {

        return a + b;

    }

}