Code could not compile: No overload for method `Add' takes `1' arguments I think I might be using KeyValuePair wrong.

using System.Collections.Generic;

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

        public void AddWord(string word)
        {
            if(WordCount.ContainsKey(word))
            {
                WordCount[word] += 1;
            }
            else
            {
                WordCount[word] = 1;
            }
        }

        public void WordsWithCountGreaterThan(int count)
        {
            foreach(KeyValuePair<string, int> pair in WordCount)
            {
                if(pair.Value > count)
                {
                    WordCountGreater.Add(pair);
                }
            }
            return WordCountGreater;
        }
    }
}