using System;

public class Program

{

    public static void Main()

    {int[] array= {1,2,3,4,5,6,7,9};

     int index=0;

     int product= array[index]*array[index+1];

     index++;

     while(index+1<array.Length)

           {

             if(product<array[index]*array[index+1])

             {

                 product=array[index]*array[index+1];

                 index++;

             }

                 else

                 {

                     product=product;

                  index++;

                 }

           }

     Console.WriteLine("the highest product of th adjacent elements are :{0}",product);

    }

}