Работа с БД access

   string mytablename = "Отчет";
   string mybdpath = "C:\\BD_bank.mdb";
   string conStr = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + mybdpath;
 
   connection = new OleDbConnection(conStr);
   adapter = new OleDbDataAdapter();
   cmdBuild = new OleDbCommandBuilder(adapter);
 
   connection.Open();
   OleDbCommand command = new OleDbCommand("SELECT * FROM " +mytablename, connection);
   connection.Close();
 
   adapter.SelectCommand = command;
   DataSet dataSet = new DataSet();
   adapter.Fill(bD_bankDataSet1.Отчет);
   dataGridView1.DataSource = bD_bankDataSet1.Отчет;

   adapter.InsertCommand = cmdBuild.GetInsertCommand();
   adapter.UpdateCommand = cmdBuild.GetUpdateCommand();
   adapter.DeleteCommand = cmdBuild.GetDeleteCommand();
   adapter.Update(bD_bankDataSet1.Отчет);

            OleDbConnection DBConnection = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" + label1.Text);
            string sql = "INSERT INTO [Таблица1] ([Фамилия], [Имя], [Возраст], [Национальность]) VALUES ('ДАННЫЕ', 'ДАННЫЕ', 'ДАННЫЕ', 'ДАННЫЕ')";
            OleDbCommand OleDbCommand = new OleDbCommand(sql, DBConnection);
            dataAdapter = new OleDbDataAdapter(OleDbCommand);
            DBConnection.Open();
            OleDbCommand.ExecuteNonQuery();
            DBConnection.Close();
            ReadData();

                cmdBuild.QuotePrefix = "[";
                cmdBuild.QuoteSuffix = "]";