Sum adjacent equal numbers - Lists

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
//Write a program to sum all adjacent equal numbers in a list of decimal numbers, starting from left to right.
//After two numbers are summed, the obtained result could be equal to some of its neighbors and should be summed as well(see the examples below).
//Always sum the leftmost two equal neighbors(if several couples of equal neighbors are available).
namespace Sum_Adjacent_Equal_Numbers
{
    class Program
    {
        static void Main(string[] args)
        {
            List<decimal> list = Console.ReadLine().Split(' ').Select(decimal.Parse).ToList();
            for (int index = 0; index < list.Count - 1; index++)
            {
                if (list[index] == list[index+1])
                {
                    list[index] += list[index + 1];
                    list.RemoveAt(index + 1);
                    index-=2;
                    if (index < -1)
                    {
                        index = -1;
                    }
                }

            }
            Console.WriteLine(string.Join(" ", list));
        }
    }
}