using System;

public class Program

{

    public static double[] Simplify { get; private set; }

    public static void Main()

    {

         Details AddOrSub = new Details();

            AddOrSub.DisplayResult(Simplify);

            Console.ReadLine();

    }

}

  class Details

    {

        int NumberSimplify;

        double Solution;

​

        private void Ask()

        {

            Console.Write("Would you like to Add or Substract (1 - Add, 2 - Substract) -► ");

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

​

            switch (Opt)

            {

                case 1:

                    Console.Write("\nHow many numbers would you like to add? -► ");

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

                    break;

​

                case 2:

                    break;

            }

        }

​

        public void DisplayResult(double[] Simplify)

        {

            Console.Write("Result from Addition -► {0}", Add(Simplify));

        }

​

        private void AddDetails(ref double[] Simplify)

        {

            Ask();

            Simplify = new double[NumberSimplify];

            Console.WriteLine();

            for (int i = 0; i < Simplify.Length; i++)

            {

                Console.Write("Number {0} -► ", i + 1);

                Simplify[i] = double.Parse(Console.ReadLine());

            }

        }

​

​

​

        private double Add(double[] Simplify)

        {

            AddDetails(ref Simplify);

            for (int i = 0; i < Simplify.Length; i++)

            {

                Solution += Simplify[i];

            }

            return Solution;

        }

​

​

    }