How to see the data in adapter on console

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Data;
using System.Data.OleDb;
using Excel = Microsoft.Office.Interop.Excel;
using System.IO;
using System.Collections;
 
namespace ConsoleApplication36
{
    class Program
    {
 
        public static OleDbDataAdapter CreateCustomerAdapter(OleDbConnection connection)
        {
            OleDbDataAdapter adapter = new OleDbDataAdapter();
            OleDbCommand command;
 
            // Create the SelectCommand.
            command = new OleDbCommand("SELECT * FROM Customers " +
                "WHERE Country = ? AND City = ?", connection);
 
            command.Parameters.Add("Country", OleDbType.VarChar, 15);
            command.Parameters.Add("City", OleDbType.VarChar, 15);
 
            adapter.SelectCommand = command;
 
            // Create the InsertCommand.
            command = new OleDbCommand(
                "INSERT INTO Customers (CustomerID, CompanyName) " +
                "VALUES (?, ?)", connection);
 
            command.Parameters.Add(
                "CustomerID", OleDbType.Char, 5, "CustomerID");
            command.Parameters.Add(
                "CompanyName", OleDbType.VarChar, 40, "CompanyName");
 
            adapter.InsertCommand = command;
            return adapter;
        }
 

        static void Main()
        {
            var p = new Program();
            p.Bar();
        }
 
        void Bar()
        {
	    DataTable t = new DataTable();
            OleDbConnection connection = null;
            //DataSet ds = new DataSet();
            OleDbDataAdapter adapter1 = new OleDbDataAdapter();
 
            adapter1 = CreateCustomerAdapter(connection);
	    adapter1.Fill(t);
            PrintDataTable(t);
            Console.ReadKey();
 
        }
        void PrintDataTable(DataTable dt)
        {
		foreach (DataRow row in dt.Rows)
	{
     	Console.WriteLine();
     		for(int x = 0; x < dt.Columns.Count; x++)
     		{
          	Console.Write(row[x].ToString() + " | ");
     		}
	}
        }
    }
}