Sum 5 Elements

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;

namespace novo2
{
    class Program
    {
        static int a;
        static void Main(string[] args)
        {
            string p;
            p = Console.ReadLine();
            string[] numbers = p.Split(' ');
            double sum = 0;
            double numberToSum;
            for (int i = 0; i < numbers.Length; i++)
            {
             numberToSum = Convert.ToDouble(p.Split(' ')[i]);
               sum = sum + numberToSum;
            }
            Console.WriteLine(sum);
            }
        }
    }