public void Delete(Sponsors sponsor)
{
var del = conferenceContext.Sponsors.Remove(sponsor);
conferenceContext.SaveChanges();
}
void SortSponsors(IEnumerable <Sponsor> sponsors)
{
var sponsorsRanked = sponsors.OrderBy(x => x.Name).ThenBy(x => x.Rank);
Sponsors.ReplaceRange(sponsorsRanked);
}
