using System;

public class Program

{

    static int GetMax(int x1, int x2)

    {

        int max = x1;

        if (x2 > x1)

        {

            max = x2;

        }

        return max; 

    }

    public static void Main()

    {

        int x1 = int.Parse(Console.ReadLine());

        int x2 = int.Parse(Console.ReadLine());

        int x3 = int.Parse(Console.ReadLine());

        int max = GetMax(GetMax(x1, x2), x3);

        Console.WriteLine("The maximum number is: " + max);

    }

}

​

//Create a method GetMax() with two integer (int) parameters, that

//returns maximal of the two numbers. Write a program that reads three

//numbers from the console and prints the biggest of them. Use the

//GetMax() method you just created. Write a test program that validates

//that the methods works correctly.