Non-webform MD5 string Encryption

/**/ /// <Summary>
///MD5 encrypted string
/// </Summary>
/// <Param name = "str">String to be encrypted</Param>
/// <Returns> </returns>
Public   Static   String Encrypt ( String Str)
{
Byte [] Bvalue;
Byte [] Bhash;
String Result = Null ;
System. Security. cryptography. md5cryptoserviceprovider MD5 =   New System. Security. cryptography. md5cryptoserviceprovider ();

Bvalue = System. Text. encoding. utf8.getbytes (STR );

Bhash = Md5.computehash (bvalue );

Md5.clear ();

For ( Int I = 0 ; I < Bhash. length; I ++ )
{
If (Bhash [I]. tostring ( " X " ). Length = 1 )
{< br> // If the returned value is 07, 0 is saved, therefore, a 0
result += " 0 " + bhash [I]. tostring ( " x " );
}
Else
{
Result+ =Bhash [I]. tostring ("X");
}

}
Return Result. toupper ();
}