private void Button_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
MemberType member = cardView.CardSearchMemberCollection.Where(x => x.Username == MemberAutocomplete.Text).FirstOrDefault();
MemberType isattached = cardView.CardMemberCollection.Where(x => x.Username == MemberAutocomplete.Text).FirstOrDefault();
CardType card = PhoneApplicationService.Current.State["CurrentCard"] as CardType;
if (member != null && isattached == null)
{
cardView.AddNewUserToCard(card.ID, member.ID);
}
else if (isattached != null)
{
MessageBox.Show("Selected member is already attached to this card");
}
}