void SortSponsors(IEnumerable <Sponsor> sponsors)
{
var groups = from sponsor in sponsors
orderby sponsor.SponsorLevel?.Rank ?? 9999
group sponsor by sponsor.SponsorLevel?.Name ?? "Sponsor"
into sponsorGroup
select new Grouping <string, Sponsor>(sponsorGroup.Key, sponsorGroup.OrderBy(s => s.Rank));
SponsorsGrouped.ReplaceRange(groups);
}
void SortSponsors(IEnumerable <Sponsor> sponsors)
{
var sponsorsRanked = from sponsor in sponsors
orderby sponsor.Name, sponsor.Rank
orderby sponsor.SponsorLevel.Rank
select sponsor;
Sponsors.ReplaceRange(sponsorsRanked);
var groups = from sponsor in Sponsors
group sponsor by sponsor.SponsorLevel.Name
into sponsorGroup
select new Grouping <string, Sponsor>(sponsorGroup.Key, sponsorGroup);
SponsorsGrouped.ReplaceRange(groups);
}