C#汉字生成简拼

using Microsoft.International.Converters.PinYinConverter;

//功能：获取汉字字符的每个汉字第一个字符，若是非汉字原样显示出来，需要引用ChnCharInfo.dll文件    

public static string ChineseCharToPingyin(string str)
        {
            if (null == str || str.Length <= 0)
            {
                return "";
            }
            StringBuilder sb = new StringBuilder("");
            ChineseChar chineseChar = null;
            for (int i = 0; i < str.Length; i++)
            {
                try
                {
                    chineseChar = new ChineseChar(str[i]);
                    if (null != chineseChar.Pinyins[0] && chineseChar.Pinyins[0].Length > 0)
                        sb.Append(chineseChar.Pinyins[0][0]);
                }
                catch
                {
                    sb.Append(str[i]);
                }

            }
            return sb.ToString();
        }