C # obtain the initials of Chinese characters and Pinyin

/// <Summary>
/// Obtain the first pinyin letter of a single Chinese Character
/// </Summary>
/// <Param name = "cn"> </param>
/// <Returns> </returns>
Public static string getSpell (string cn)
{
# Region
Byte [] arrCN = Encoding. Default. GetBytes (cn );
If (arrCN. Length> 1)
{
Int area = (short) arrCN [0];
Int pos = (short) arrCN [1];
Int code = (area <8) + pos;
Int [] areacode = {45217,452 53, 45761,463 18, 46826,470 10, 47297,476 14, 48119,481 19, 49062,493 24, 49896,503 71, 50614,506 22, 50906,513 87, 51446,522 18, 52698,526 98, 52698,529 80, 53689,544 81 };
For (int I = 0; I <26; I ++)
{
Int max = 55290;
If (I! = 25) max = areacode [I + 1];
If (areacode [I] <= code & code <max)
{
Return Encoding. Default. GetString (new byte [] {(byte) (65 + I )});
}
}
Return cn;
}
Else return cn;
# Endregion
}

/// <Summary>
/// Obtain the first letter of a Chinese character string
/// </Summary>
/// <Param name = "str"> </param>
/// <Returns> </returns>
Public static string GetStringSpell (string str)
{
Char [] chars = str. ToCharArray ();
String result = "";
If (chars. Length> 1)
{
For (int I = 0; I <chars. Length; I ++)
{
Result + = getSpell (chars [I]. ToString ());
}
}
Else if (chars. Length = 1)
{
Result = getSpell (str );
}

Return result. ToLower ();

}