csharp:汉字转带拼音声调

/// <summary>         /// �� 塘㙍镇        ///涂聚文 20130623        ///http://zh.wiktionary.org/wiki/Wiktionary:%E9%83%A8%E9%A6%96%E7%B4%A2%E5%BC%95         /// </summary>         /// <param name="sender"></param>         /// <param name="e"></param>         private void button2_Click(object sender, EventArgs e)         {             //必須用此設置，否則這樣的字“㙍，��”等輸入進去成亂碼             this.ImeMode = System.Windows.Forms.ImeMode.On;              string pydic="吖ā|阿ā|啊ā|锕ā|錒ā|嗄á|厑ae|哎āi|哀āi|樉shuǎng|谁shuí|鹴shuāng|爽shuǎng|鏯shuǎng|孀shuāng|孇shuāng|騻shuāng|焋zhuàng|幢zhuàng|撞zhuàng|隹zhuī|傱shuǎn|㙍duō|kuǎi|zhǒu";             string[] temp = pydic.Split(new char[] { '|' });              foreach (string var in temp)             {                 string key = var.Substring(0, 1);                 string value = var.Substring(1,var.Length-1);                 hashtable[key] = value;             }              this.textBox3.Text = ToPinYin(this.textBox2.Text.Trim());              //string[] results = pydic.Split(new[] { '|' }, 2, StringSplitOptions.None);             //for (int i = 0; i < results.Length; i++)             //{             //    Console.WriteLine("\tElement {0}: \"{1}\"", i, results[i]);             //}         }          /// <summary>         ///         /// </summary>         /// <param name="hanzi"></param>         /// <returns></returns>         public static string ToPinYin(string hanzi)         {             StringBuilder sb = new StringBuilder();              foreach (char var in hanzi)             {                 string s = hashtable[var.ToString()] as string;                  if (s != null)                 {                     sb.Append(s);                 }                 else                 {                    // MessageBox.Show(s);                 }             }              return sb.ToString();         }