Use ODBC Data Provider : OdbcConnection « ADO.Net « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. ADO.Net
3. OdbcConnection

using System;
using System.Data;
using System.Data.Odbc;

class MainClass
{
   static void Main(string[] args)
   {
      string connString = @"dsn=northwindodbc";

      string sql = @"select * from employee";

      OdbcConnection conn = null;
      OdbcDataReader reader = null;

      try
      {
         conn = new OdbcConnection(connString);
         conn.Open();

         OdbcCommand cmd = new OdbcCommand(sql, conn);
         reader = cmd.ExecuteReader();

         Console.WriteLine("Querying database {0} with query {1}\n", conn.Database, cmd.CommandText );

         while(reader.Read()) {
            Console.WriteLine("{0} | {1}", reader["FirstName"].ToString().PadLeft(10) , reader[1].ToString().PadLeft(10) );
         }
      }
      catch (Exception e)
      {
         Console.WriteLine("Error: " + e);
      }
      finally
      {
         reader.Close();
         conn.Close();
      }
   }
}