string text = null;
		string text2 = null;
		char[] array = null;
		long num = 0L;
		byte b = 0;
		byte b2 = 0;
		byte b3 = 0;
		byte b4 = 0;
		text = UserName.ToLower() + ProdName.ToLower();
		text2 = DigestStrToHexStr(text);
		array = HexStrToBinStr(text2);
		num = (F_Code & 0xFFFF);
		b = (byte)(num & 0xFF);
		b2 = (byte)((num & 0xFF00) / 256 & 0xFF);
		char c = array[array.Length - 1];
		char c2 = array[array.Length - 2];
		b3 = (byte)c;
		b4 = (byte)c2;
		b3 = (byte)(b3 ^ b);
		b4 = (byte)(b4 ^ b2);
		char c3 = (char)b3;
		char c4 = (char)b4;
		string text3 = new string(array);
		text3 = text3.Substring(0, array.Length - 2);
		text3 = text3 + c4 + c3;
		text3 = text3.Substring(2, text3.Length - 2);
		string text4 = DigestStrToHexStr(text3);
		string str = text4.Substring(0, 2);
		string str2 = text4.Substring(text4.Length - 2, 2);
		string str3 = BinStrToHexStr(text3);
		return str + str2 + str3;