แปลง PHP เป็น ASP.NET (VB หรือ C# ก็ได้) รบกวนหน่อยครับ

//$delimiter = ' ';
string delimiter = " ";

//if ($_POST['message']!=NULL)
if (Request.Form["message"] != null) //<-- ของ asp.net มี viewstat ซึ่งน่าใช้กว่า Request.Form นะ
{
    //Get Time Stamp
    //$time_before = time();
    DateTime time_before = DateTime.Now.ToLocalTime();

    //$data = $_POST['message'];
    string data = Request.Form["message"].ToString();

    //while($data!=NULL)
    while (data != null)
    {
        //Previous Pos Value
        //$p_pos = $pos;
        int p_pos = pos; //<-- pos ไม่รู้ประกาศไว้ที่ไหนนะ แต่คงเป็น int เพราะด้านล่างแทนค่าด้วย int

        //Reset Pos Value
        //$pos = -1;
        pos = -1;

        //$unit = substr($data,0,1);
        string unit = data.Substring(0, 1);
        //$unit2 = substr($data,0,2);
        string unit2 = data.Substring(0, 2);
        //$len = strlen($data)+1;
        int len = data.Lenght + 1;

        //เพิ่มส่วนติดต่อ mysql
        System.Data.SqlClient.SqlConnection MySqlConnection = new System.Data.SqlClient.SqlConnection("Your connection string.");

        //Cross out the number
        //if (!((($unit>='0')&&($unit<='9'))||(($unit>='A')&&($unit<='z'))))
        if (!((unit >= "0" && unit <= "9") || (unit >= "A" && unit <= "z")))
        {
            //$query = "SELECT tkey FROM tws WHERE tkey LIKE '$unit2%' AND amount <= $len;";
            //$result = mysql_query($query) or die("Can't Connect DB!");
            System.Data.SqlClient.SqlCommand MySqlCommand = new System.Data.SqlClient.SqlCommand("SELECT [tkey] FROM [tws] WHERE [tkey] LIKE @unit2 AND [amount] <= @len", MySqlConnection);
            MySqlCommand.Parameters.Add("@unit2", SqlDbType.NVarChar).Value = uint2 + "%";
            MySqlCommand.Parameters.Add("@len", SqlDbType.Int).Value = len;

            MySqlConnection.Open();

            System.Data.SqlClient.SqlDataReader reader = MySqlCommand.ExecuteReader();

            //เพิ่ม
            string final = string.Empty;

            //while($row = mysql_fetch_array($result))
            while (reader.Read())
            {
                //$pos = strpos($data,$row[tkey]);
                pos = data.IndexOf(reader[tkey].ToString());

                //if ($pos===0)
                if (pos == 0)
                {
                    //$data = substr($data,strlen($row[tkey]));
                    data = data.Substring(reader[tkey].ToString().Lenght);
                    //$final .= $delimiter.$row[tkey];
                    final += delimiter + reader[tkey].ToString();
                    break;
                }
            }

            //เพิ่ม
            reader.Close();
            MySqlConnection.Close();
        }

        //if ($pos!==0)
        if (pos != 0)
        {
            //if ($p_pos===0) 
                //$final .= $delimiter;
            if (p_pos == 0)
                final += delimiter;
        
            //$final .= $unit;
            final += unit;
            //$data = substr($data,1);
            data = data.Substring(1);
        }
    }
}