System Data Oledb C# by API

using System;
using System.Data;
using System.Data.Common;
using System.Data.OleDb;
class MainClass
{
  static void Main(string[] args)
  {
    string connectionString = "Provider=Microsoft.JET.OLEDB.4.0;data source=C:\\Northwind.mdb";
    OleDbConnection conn = new OleDbConnection(connectionString);
    string sql = "SELECT * FROM Orders";
                                          
    OleDbCommand cmd = new OleDbCommand(sql, conn);
    conn.Open();
    OleDbDataReader reader;
    reader = cmd.ExecuteReader();
    while (reader.Read()) 
    {
      Console.Write(reader.GetString(0).ToString() + " ," );
      Console.Write(reader.GetString(1).ToString() + " ," );
      Console.WriteLine("");
    }
    reader.Close();
    conn.Close();
  }
}