c# 中文转拼音without CJK

public class PinYinUtils
{
 private static readonly Dictionary<string,string> PinYinDict = new Dictionary<string,string>
 {

 {"猿","YUAN"}
 // 等............
 };
 /// <summary>
 /// Return to the first letter
 /// </summary>
 /// <param name="word">Chinese word</param>
 /// <example>
 /// GetFirstPinyinChar("张三")
 /// will return "Z"
 /// Can be used for address book index and so on
 /// </example>
 /// <returns></returns>
 public static string GetFirstPinyinChar(string word)
 {
 if (word.Length == 0) return "#";
 var firstLetter = word[0].ToString();
 if (PinYinDict.ContainsKey(firstLetter))
 {
  return PinYinDict[firstLetter];
 }
 return firstLetter;
 }
 /// <summary>
 /// return the chinese char's pinyin
 /// </summary>
 /// <param name="chineseChar"></param>
 /// <example>
 /// GetPinYin('福')
 /// will return "FU"
 /// </example>
 /// <returns></returns>
 public static string GetPinYin(char chineseChar)
 {
 var str = chineseChar.ToString();
 if (PinYinDict.ContainsKey(str))
 {
  return PinYinDict[str];
 }
 return null;
 }
 /// <summary>
 /// Get the phonetic abbreviation for Chinese char
 /// </summary>
 /// <param name="chineseChar"></param>
 /// <example>
 /// GetShortPinYin('福')
 /// will return "F"
 /// </example>
 /// <returns></returns>
 public static string GetShortPinYin(char chineseChar)
 {
 var str = chineseChar.ToString();
 if (PinYinDict.ContainsKey(str))
 {
  var first = PinYinDict[str].FirstOrDefault();
  if (first == 0) return null;
  return first.ToString();
 }
 return null;
 }
}