using System;  

public class Program 

{

    public static int areaRectangle(int a, int b) 

    { 

        int area = a * b; 

        return area; 

    } 

   public static int perimeterRectangle(int a, int b) 

    { 

        int perimeter = 2 * (a + b); 

        return perimeter; 

    } 

    public static void Main() 

    { 

        int a = 15; 

        int b = 26; 

        Console.WriteLine("Area = "

                      + areaRectangle(a, b)); 

        Console.WriteLine("Perimeter = " 

                 + perimeterRectangle(a, b)); 

    } 

} 

​

​