public override void RemoveItem(HttpContext context,
                                    string id,
                                    object lockId,
                                    SessionStateStoreData item)
    {
      var conn = new MySqlConnection(connectionString);
      var cmd = new MySqlCommand("DELETE FROM sessions WHERE SessionId = ?SessionId AND ApplicationName = ?ApplicationName AND LockId = ?LockId", conn);
      cmd.Parameters.Add("?SessionId", MySqlDbType.VarChar, 80).Value = id;
      cmd.Parameters.Add("?ApplicationName", MySqlDbType.VarChar, 255).Value = ApplicationName;
      cmd.Parameters.Add("?LockId", MySqlDbType.Int32).Value = lockId;

      try
      {
        conn.Open();

        cmd.ExecuteNonQuery();
      }
      catch (MySqlException e)
      {
        if (WriteExceptionsToEventLog)
        {
          WriteToEventLog(e, "RemoveItem");
          throw new ProviderException(exceptionMessage);
        }
        else
          throw e;
      }
      finally
      {
        conn.Close();
      }
    }