TableView and Cells

I am using the TableView for some form based views. Pretty straight forward but I came across some issues :

1. When deleting from a TableSection a row the TableView doesn't autorefresh. Is there a way to force it to refresh (Tried only on iOS)
2. What is the right way of adding / removing cells dynamically in a tableview. (Or hiding cells)
3. When creating your own custom cell deriving from Cell how do you handle OnPropertyChanged ? (there is no OnModelPropertyChanged) And I do get why there isn't any but how should I update my properties of views within my Cell ?

Kind Regards,
Robert