using System;

​

namespace pascal_triangle

{

   public class Program

    {

​

        static public void Main()

        {

            int numeric;

            string answer;

            string numericInput;

​

            do

            {

                Console.WriteLine("Pascal Triangle");

                Console.Write("Enter the row number: ");

                numericInput = Console.ReadLine();

​

                if (Int32.TryParse(numericInput, out numeric) == true)

                {

                    if (numeric < 0)

                    {

                        Console.WriteLine("Negative number are Not Valid!");

                    }

                    else

                    {

                        if (numeric >= 26)

                        {

                            Console.WriteLine("Input Number Greater than 25 is Not Allowed!");

                        }

                        else

                        {

                            long sum = 0;

​

                            for (int row = 0; row < numeric; row++)

                            {

                                sum = sum + (1 << row);

                            }

                            Console.WriteLine("The sum of numbers above row is: " + sum);

                            long sumnext = 0;

                            numeric = numeric + 1;

​

                            for (int rows = 1; rows < numeric; rows++)

                            {

                                sumnext = sum + (1 << rows);

                            }

                            Console.WriteLine("he sum of numbers row is: " + sumnext);

                        } 

                    }

                }

                else

                {

                    Console.WriteLine("Input number only!");

                }

​

                Console.WriteLine("Do you want to continue? (Y/y: )");

                answer = Console.ReadLine();

                Console.Clear();

            } while ((answer == "Y") || (answer == "y"));

            Console.WriteLine(" End of program.... enter any key!");

​

        }

    }

}