SaveEmailAddressTask is a chooser that allows the user to save a specified email address using the built-in Contacts application. An email address can be saved to an existing contact or to a new contact.
SaveEmailAddressTask does not return data, but its
Completed event can be handled to determine whether the task was completed correctly.
SaveEmailAddressTask should be defined as a field in your class, like so:
readonly SaveEmailAddressTask saveEmailAddressTask = new SaveEmailAddressTask();
Subscribe to the
SaveEmailAddressTask.Completed event within your class constructor, as shown: