ADO Database C#

using System;
using System.Data;
using System.Data.SqlClient;
class Class1{
  static void Main(string[] args){
         SqlConnection thisConnection = new SqlConnection("server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI");
         SqlDataAdapter thisAdapter = new SqlDataAdapter("SELECT ID, FirstName FROM Employee", thisConnection);
         DataSet thisDataSet = new DataSet();
         thisAdapter.Fill(thisDataSet, "Employee");
         foreach (DataRow theRow in thisDataSet.Tables["Employee"].Rows)
         {
            Console.WriteLine(theRow["ID"] + "\t" + theRow["FirstName"]);
         }
  }
}