Added ParkingData class to keep track of all the data we need. It's created in the "Menu" page, and you need to pass it around through all the pages to keep the data consistent. The data will be wiped if you go back to the "Menu" page. For a full example of how to set this up, check out the "Pay By Card" functionality which is pretty much done. Notice how in the .xaml files I have defined the view text in the form of a Binding. Doing this allows us to handle all of the data manipulation in the ParkingData object that we're passing around, and the views will automatically update themselves. If you need a new way of manipulating the data, add a public method to the ParkingData class and call it from your click handler (or other event handler) in the view. A good example of this at work can be found in "PayEnterTime.xaml" and "PayEnterTime.xaml.cs".
Merge branch 'master' of https://github.com/FadyMak/WalkInThePark