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");
         thisConnection.Open();
         SqlDataAdapter thisAdapter = new SqlDataAdapter("SELECT ID from Employee", thisConnection);
         SqlCommandBuilder thisBuilder = new SqlCommandBuilder(thisAdapter);
         Console.WriteLine("SQL SELECT Command is:\n{0}\n", thisAdapter.SelectCommand.CommandText);
         SqlCommand updateCommand = thisBuilder.GetUpdateCommand();
         Console.WriteLine("SQL UPDATE Command is:\n{0}\n", updateCommand.CommandText);
         SqlCommand insertCommand = thisBuilder.GetInsertCommand();
         Console.WriteLine("SQL INSERT Command is:\n{0}\n", insertCommand.CommandText);
         SqlCommand deleteCommand = thisBuilder.GetDeleteCommand();
         Console.WriteLine("SQL DELETE Command is:\n{0}", deleteCommand.CommandText);
         thisConnection.Close();
  }
}