//To Add click event to our Buttons we will use ICommand here to switch pages when specific button is clicked
 public MenuItemsData()
 {
     Command = new CommandViewModel(Execute);
 }
 //To Add click event to our Buttons we will use ICommand here to switch pages when specific button is clicked
 public SubMenuItemsData()
 {
     SubMenuCommand = new CommandViewModel(Execute);
 }