Delete Duplicate Referrals based on latest date initiated

DeleteReferrals.cs

var referralsToDelete = duplicateReferrals
	.GroupBy(r => r.Data.UniqueId)
	.Where(g => g.Count() > 1)
	.SelectMany(g => g.OrderBy(r => r.Data.DateInitiatedUtc).Skip(1));

foreach (var referralToDelete in referralsToDelete)
{
    graphClient.Delete(referralNodeToDelete.Reference, DeleteMode.NodeAndRelationships);
}