protected void Page_Load(object sender, EventArgs e)
 {
     if (!IsPostBack)
     {
         MasterPage.setCurrentPage(this);
         lgCtrl = GetControl();
         StationeryStoreInventorySystemController.Util.PutSession(sessionKey, lgCtrl);
     }
     else
     {
         lgCtrl = (LoginControl) StationeryStoreInventorySystemController.Util.GetSession(sessionKey);
         if (lgCtrl == null)
         {
             lgCtrl = GetControl();
             StationeryStoreInventorySystemController.Util.PutSession(sessionKey, lgCtrl);
         }
     }
 }
 private LoginControl GetControl()
 {
     if (lgCtrl == null)
         lgCtrl = new LoginControl();
     return lgCtrl;
 }