Help with Task 2 of 2 in C# Dictionary

using System.Collections.Generic;

namespace Treehouse.CodeChallenges
{
    public class LexicalAnalysis
    {
        public Dictionary<string, int> WordCount = new Dictionary<string, int>();

        public void AddWord(string word)
        {
            int count = 0;
            if(WordCount.ContainsKey(word))
            {
                WordCount[word] = WordCount[word] + 1; 
            }
            else if(!(WordCount.ContainsKey(word)))
            { 
                WordCount.Add(word,count+1);
            }
        }

        public Dictionary<string,int> WordsWithCountGreaterThan(int input)                           //This is the method I made for this task
        {
            public Dictionary<string, int> WordsGreaterThan = new Dictionary<string, int>();        ///The error is supposed to be here

            foreach(KeyValuePair<string,int> word1 in WordCount)
            {
                if(WordCount[word1] < input)
                {
                    WordsGreaterThan.Add(word1 , WordCount[word1]);
                }
            }
            return WordsGreaterThan;
        }
    }
}