Performing Select, Insert, Update and Delete with ease in Silverlight 4 using WCF RIA Services

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Navigation;
using System.Windows.Shapes;
using SilverlightWCFRIA.Web;
using System.ServiceModel.DomainServices.Client;

namespace SilverlightWCFRIA
{
    public partial class ShowData : Page
    {
        StudentDomainContext objctx;// StudentDomainContext class in the generated code acts as the "proxy" to communicate from the Silverlight client to the domain service
        public ShowData()
        {
            InitializeComponent();
            objctx = new StudentDomainContext();//creating the instance of DomainContext corresponding the StudentDomainService
            EntityQuery<student> query = objctx.GetStudentsQuery();//passing the query to EntityQuery
            LoadOperation<student> loadOp = this.objctx.Load(query);
            studentgrid.ItemsSource = loadOp.Entities;//setting the Itemsource of DataGrid to the entities loaded.
        }


        // Executes when the user navigates to this page.
        protected override void OnNavigatedTo(NavigationEventArgs e)
        {
        }
    }
}