ADO Database C#

using System;
using System.Data;
using System.Data.SqlClient;
   class WriteXML {
      static void Main(){
         string connString = "server=(local)\\SQLEXPRESS;database=MyDatabase;Integrated Security=SSPI";
         string qry = @"select * from employee";
         SqlConnection conn = new SqlConnection(connString);
         try{
            SqlDataAdapter da = new SqlDataAdapter();
            da.SelectCommand = new SqlCommand(qry, conn);
            conn.Open();
            DataSet ds = new DataSet();   
            da.Fill(ds, "employee");
            ds.WriteXml(@"employee.xml");
         } catch(Exception e) {
            Console.WriteLine("Error: " + e);
         } finally {
            conn.Close();
         }
      }
   }