public void DeleteUser()
{
User rmvuser = DisplayUsers.FirstOrDefault(n => n.FullName == fullname);
DisplayUsers.Remove(rmvuser);
OrderedUsers = DisplayUsers.OrderBy(x => x.Surname).ToList();
}
//Use of Command for feftching values from xaml
public void SaveUser()
{
User addeduser = new User();
addeduser.Name = name;
addeduser.Surname = surname;
DisplayUsers.Add(addeduser);
//DisplayUsers = new ObservableCollection<User>();
//OrderedUsers = new ObservableCollection<User>(DisplayUsers.OrderBy(x => x.Surname));
OrderedUsers = DisplayUsers.OrderBy(x => x.Surname).ToList();
}