This is part of the on-going series of posts on Learning Xamarin; 
a complete index to the series can be found here. In the previous installment, I modified the application that I began in this posting.
Today, we extend that application in a couple of ways. First, it really bothered me to have “Add criterion” on the items page; it seemed much more reasonable to have it on the Details (criteria) page, and so we’ll move it.
Second, currently we have no way of adding new items (e.g., a new Dishwasher) so we’ll add that ability.
The process of making these changes will make evident that once you get the pattern, adding pages and navigating among them is pretty straightforward.
Continued here
