C#統計字符出現個數

做畢設時，需要統計漢語語料庫中單詞（單詞已經粗切分）出現的頻率，想到與我們開始學習C語言時統計字符串中每個字符出現的個數類似，就想用C#實現一下，發現泛型集合類Dictionary很有用，幾行代碼就搞定，爽！

 1         private static void FnCountWord()
2         {
3             String text = Console.ReadLine();
4             Dictionary<Char, int> charDict = new Dictionary<char, int>();
5             for (int i = 0; i < text.Length; i++)
6             {
7                 if (charDict.ContainsKey(text[i]) == true)
8                 {
9                     charDict[text[i]]++;
10                 }
11                 else
12                 {
13                     charDict.Add(text[i], 1);
14                 }
15             }
16             //int編號，KeyValuePair<Char, int>中char字符，int統計字符數量
17              Dictionary<int, KeyValuePair<Char, int>> charID = new Dictionary<int, KeyValuePair<Char, int>>();
18             int k = 0;
19             foreach (KeyValuePair<Char, int> charInfo in charDict)
20 &