Methods or functions in C#

using System;

namespace CalculatorApplication

{

    

    class NumberManipulator

    {

        public int FindMax(int num1, int num2)

        {

            int result;  /* local variable declaration */

            if (num1 > num2)

                result = num1;

            else

                result = num2;

            return result;

        }

    }

    class Test

    {

        static void Main(string[] args)

        {

            /* local variable definition */

            int a = 100;

            int b = 200;

            int ret;

            NumberManipulator n = new NumberManipulator();

            //calling the FindMax method

            ret = n.FindMax(a, b);

            Console.WriteLine("Max value is : {0}", ret);

            Console.ReadLine();

        }

    }

}