C Sharp Datenbanksuch und Updatefrage

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Data.Odbc;
// benötigt für die MySql Datenbankanbindung
using MySql.Data.MySqlClient;

namespace SyncService
{
    class Program
    {
        static void Main(string args)
        {


            // MySQL Zugangsdaten
            string mysql_host = "xxx";  
            string mysql_datenbank = "xxx";  
            string mysql_benutzername = "xxx";  
            string mysql_passwort = "xxx";  

            // MySQL Datenbank Verbindungsstring
            string mysql_connect = "server=" + mysql_host + ";database=" + mysql_datenbank + ";uid=" + mysql_benutzername + ";password=" + mysql_passwort + ";";  

            // Definieren einer neuen MySQL-Verbindung
            MySqlConnection MySQLDbConnection = new MySqlConnection(mysql_connect);

            // MySQL Datenbankverbindungstest. Falls dieser fehlschlägt, wird das Programm beendet
            try
            {
                MySQLDbConnection.Open();
            }
            catch (MySqlException ex)
            {
                Console.WriteLine("connection to the MySQL Database '" + mysql_datenbank + "' failed.");  
                Console.WriteLine("The MySQL Database returned the following message");  
                Console.WriteLine(ex.Message);
                Thread.Sleep(5000);
                return;
            }

            // ODBC DSN Name (muss zuerst in Windows per System DSN hinzugefügt werden (Access Datenbank auswählen, System DSN Name zuweisen, fertig))
            string DSN = "xxx";  

            // Definieren einer neuen Access ODBC-Verbindung
            OdbcConnection AccessDbConnection = new OdbcConnection("DSN=" + DSN);  

            // Access Datenbankverbindungstest. Falls dieser fehlschlägt, wird das Programm beendet
            try
            {
                AccessDbConnection.Open();
            }
            catch (OdbcException ex)
            {
                Console.WriteLine("connection to the DSN '" + DSN + "' failed.");  
                Console.WriteLine("The OdbcConnection returned the following message");  
                Console.WriteLine(ex.Message);
                Thread.Sleep(5000);
                return;
            }

            OdbcCommand AccessDbCommand = AccessDbConnection.CreateCommand();
            AccessDbCommand.CommandText = "SELECT * FROM CLI ORDER BY NOME ASC";  
            OdbcDataReader AccessDbReader = AccessDbCommand.ExecuteReader();


            int id = 0;
            string ida = "";  
            // Ausgeben der Einträge der Tabelle CLI
            while (AccessDbReader.Read())
            {

                id++;

                // führende 0en
                if (id <= 10)
                {
                    ida = "0000";  
                }
                if (id >= 10)
                {
                    ida = "000";  
                }
                if (id >= 100)
                {
                    ida = "00";  
                }
                if (id >= 1000)
                {
                    ida = "0";  
                }

                // GetString(0) = Vertragsnummer
                String CODICE = AccessDbReader.GetString(0);
                
                // GetString(1) = Name
                String NOME = AccessDbReader.GetString(1);

                Console.WriteLine(ida + id + " | ");  


                MySqlCommand mysql_command_update = new MySqlCommand("INSERT INTO `" + mysql_datenbank + "`.`CLI` (`CODICE`,`NOME`) VALUES ('" + CODICE + "','" + NOME + "');", MySQLDbConnection);  
                mysql_command_update.ExecuteNonQuery();

            }
            Thread.Sleep(99999);

            AccessDbReader.Close();
            AccessDbCommand.Dispose();
            AccessDbConnection.Close();


        }
    }
}