OddOccurrences-withDictionary

using System;
using System.Collections.Generic;
using System.Linq;

namespace OddOccurrences
{
    class MainClass
    {
        public static void Main()
        {
            List<string> listOfWords = Console.ReadLine().Split().ToList();

            Dictionary<string, int> dictionary = new Dictionary<string, int>();

            for (int i = 0; i <= listOfWords.Count-1; i++)
            {
                string word = listOfWords[i].ToLower();
                if (dictionary.ContainsKey(word) == false)
                {
                    dictionary[word] = 1;
                }

                else
                {
                    dictionary[word]++;
                }
            }

            var filteredDict = dictionary.Where(x => x.Value % 2 != 0).ToDictionary(x => x.Key, x => x.Value);
            Console.WriteLine(string.Join(" ",filteredDict.Keys));
        }

      }

    }