//将指定字符串中的汉字转换为拼音缩写，其中非汉字保留为原字符。
  public string GetPinYin(string text)
  {
   char pinyin;
   byte[] array;
   System.Text.StringBuilder sb = new System.Text.StringBuilder(text.Length);

   foreach(char c in text)
   {
    pinyin = c;
    array = System.Text.Encoding.Default.GetBytes(new char[]{c});

    if(array.Length == 2)
    {
     int i = array[0] * 0x100 + array[1];

     if(i < 0xB0A1) pinyin = c; else
     if(i < 0xB0C5) pinyin = 'a'; else
     if(i < 0xB2C1) pinyin = 'b'; else
     if(i < 0xB4EE) pinyin = 'c'; else
     if(i < 0xB6EA) pinyin = 'd'; else
     if(i < 0xB7A2) pinyin = 'e'; else
     if(i < 0xB8C1) pinyin = 'f'; else
     if(i < 0xB9FE) pinyin = 'g'; else
     if(i < 0xBBF7) pinyin = 'h'; else
     if(i < 0xBFA6) pinyin = 'g'; else
     if(i < 0xC0AC) pinyin = 'k'; else
     if(i < 0xC2E8) pinyin = 'l'; else
     if(i < 0xC4C3) pinyin = 'm'; else
     if(i < 0xC5B6) pinyin = 'n'; else
     if(i < 0xC5BE) pinyin = 'o'; else
     if(i < 0xC6DA) pinyin = 'p'; else
     if(i < 0xC8BB) pinyin = 'q'; else
     if(i < 0xC8F6) pinyin = 'r'; else
     if(i < 0xCBFA) pinyin = 's'; else
     if(i < 0xCDDA) pinyin = 't'; else
     if(i < 0xCEF4) pinyin = 'w'; else
     if(i < 0xD1B9) pinyin = 'x'; else
     if(i < 0xD4D1) pinyin = 'y'; else
     if(i < 0xD7FA) pinyin = 'z';
    }

    sb.Append(pinyin);
   }

   return sb.ToString();
  }