public override void OnResume()
{
base.OnResume();
viewsHelper.ViewEnabledPredicates(
WizardActivity.ButtonNext,
new List <KeyValuePair <int, Predicate <string> > >
{
new KeyValuePair <int, Predicate <string> >(Resource.Id.edtLastName, ValidateHasContent),
new KeyValuePair <int, Predicate <string> >(Resource.Id.edtFirstName, ValidateHasContent),
new KeyValuePair <int, Predicate <string> >(Resource.Id.edtPhone, ValidateHasContent),
new KeyValuePair <int, Predicate <string> >(Resource.Id.edtPhone, PhoneNumberLooksOk)
});
viewsHelper.SetViewEnabledState(WizardActivity.ButtonNext);
}