Sending and retrieving parameters through page navigation can be really useful. Windows Phone 7 uses a navigation system that allows this feature using the NavigationContext and QueryString.
Sending a parameter
Sending a parameter is just like sending a QueryString parameter as part of an url and I use the NavigationService to navigate.
Receiving a parameter
Receiving a parameter is just as easy as sending it and just like receiving a normal QueryString parameter. To receive the parameter I’m using the NavigationContext that can retrieve QueryString parameters.