ADO Net C# Tutorial

using System;
using System.Data;            
using System.Data.OleDb;      
using System.Collections.Generic;
using System.Text;
  class Program{
    static void Main(string[] args){
           OleDbConnection thisConnection = new OleDbConnection(@"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=nwind.mdb");
          thisConnection.Open();
    
          OleDbCommand thisCommand = thisConnection.CreateCommand();
    
          thisCommand.CommandText = "SELECT CustomerID, CompanyName FROM Customers";
    
          OleDbDataReader thisReader = thisCommand.ExecuteReader();
    
          while (thisReader.Read()){
             Console.WriteLine("\t{0}\t{1}",
             thisReader["CustomerID"], thisReader["CompanyName"]);
          }
          thisReader.Close();
          thisConnection.Close();
       }  
  }