Code:
string line;
            string ConnString = @"Provider=Microsoft.Jet.OLEDB.4.0;Data Source=C:\Documents and Settings\Valentino\Desktop\aplikacija\pubs2002.mdb;Persist Security Info=False";
            OleDbConnection myConnection = new OleDbConnection(ConnString);
            myConnection.Open();
            OleDbCommand myCommand = new OleDbCommand("SELECT * FROM EMPLOYEE", myConnection);

            OleDbDataReader myDataReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection);

            while (myDataReader.Read())
            {
                line = string.Format(myDataReader[0] + " -- " + myDataReader[1]);
                listBox1.Items.Add(line);
            }

            myConnection.Close();