csharp: Converting chinese character to Unicode

Function chinese2unicode(Str)    Dim Str_one:Str_one = ""    Dim Str_unicode:Str_unicode = ""    For i  = 1 To Len(Str)        Str_one = Mid(Str, i, 1)        If AscW(Str_one) < 0 or AscW(Str_one) > 255 Then            Str_unicode = Str_unicode & Chr(38)            Str_unicode = Str_unicode & Chr(35)            Str_unicode = Str_unicode & Chr(120)            Str_unicode = Str_unicode & Hex(AscW(Str_one))            Str_unicode = Str_unicode & Chr(59)        Else            Str_unicode = Str_unicode & Str_one        End If    Next    chinese2unicode=Str_unicodeEnd Function

 /// <summary>        /// %26%23x4EB2%3B%26%23x7231%3B%26%23x7684%3B%26%23x4F1A%3B%26%23x5458%3BTeresaLiu%2C%26%23x516D%3B%26%23x798F%3B%26%23x73E0%3B%26%23x5BF6%3B%26%23x6703%3B%26%23x54E1%3B%26%23x5BC6%3B%26%23x78BC%3B%26%23x4FEE%3B%26%23x6539%3B%26%23x9805%3B%26%23x901A%3B%26%23x77E5%3B%26%23xFF1A%3B%26%23x95A3%3B%26%23x4E0B%3B%26%23x5DF2%3B%26%23x6210%3B%26%23x529F%3B%26%23x66F4%3B%26%23x6539%3B%26%23x5BC6%3B%26%23x78BC%3B%26%23xFF0C%3B%26%23x5982%3B%26%23x6709%3B%26%23x67E5%3B%26%23x8A62%3B%26%23xFF0C%3B%26%23x8ACB%3B%26%23x81F4%3B%26%23x96FB%3B%26%23x9999%3B%26%23x6E2F%3B27109368%26%23xFF0F%3B%26%23x4E2D%3B%26%23x570B%3B4008846222        ///塗聚文 20140724        /// </summary>        /// <param name="str"></param>        /// <returns></returns>        PRivate string chinese2uncode(string str)        {            string s = "";            string outStr = "";            if (!string.IsNullOrEmpty(str))            {                for (int i = 0; i < str.Length; i++)                {                    if (Microsoft.VisualBasic.Strings.AscW(str[i].ToString()) < 0 || Microsoft.VisualBasic.Strings.AscW(str[i].ToString())>255) //如果是中文转换Regex.IsMatch(str[i].ToString(), @"[/u4e00-/u9fa5]")                    {                         //outStr += "//u" + ((int)str[i]).ToString("x");                         outStr = outStr+(char)38;// "&";//char(38);                        outStr = outStr + (char)35;// "#";                        outStr = outStr + (char)120;// "x";                        outStr = outStr + Microsoft.VisualBasic.Conversion.Hex(Microsoft.VisualBasic.Strings.AscW(str[i].ToString())); //outStr +                         outStr = outStr + (char)59;// ";";            //Str_unicode = Str_unicode & Chr(38)            //Str_unicode = Str_unicode & Chr(35)            //Str_unicode = Str_unicode & Chr(120)            //Str_unicode = Str_unicode & Hex(AscW(Str_one))                        //Str_unicode = Str_unicode & Chr(59)// ;                                            }                    else                     {                         outStr += str[i];                     }                }            }            s = outStr;            return s;        }