Bit Builder (100/100)

using System;
using System.Collections.Generic;

namespace BitBuilder
{
    class BitBuilder
    {
        static void Main()
        {
            ulong n = ulong.Parse(Console.ReadLine());
            string binary = Convert.ToString((int)n, 2).PadLeft(64,'0');
            List<ulong> binaryList = new List<ulong>();

            for (int i = 0; i < binary.Length; i++)
            {
                binaryList.Add(Convert.ToUInt64(binary[i].ToString()));
            }

            binaryList.Reverse();

            while (true)
            {
                string position = Console.ReadLine();
                if (position == "quit")
                {
                    break;
                }
                string action = Console.ReadLine();
                if (action == "flip")
                {
                    if (binaryList[Convert.ToInt32(position.ToString())]==0)
                    {
                        binaryList[Convert.ToInt32(position.ToString())] = 1;
                    }
                    else if (binaryList[Convert.ToInt32(position.ToString())]==1)
                    {
                        binaryList[Convert.ToInt32(position.ToString())] = 0;
                    }
                }
                else if (action == "insert")
                {
                    binaryList.Insert(Convert.ToInt32(position.ToString()),1);
                }
                else if (action == "remove")
                {
                    binaryList.RemoveAt(Convert.ToInt32(position.ToString()));
                }
                else if (action == "skip")
                {
                    continue;
                }
            }
            binaryList.Reverse();
            Console.WriteLine(Convert.ToUInt64(string.Join("", binaryList), 2));
        }
    }
}