private async Task AddAsync(IEnumerable <long> items)
{
var m = items.ToArray();
lock (_collectionLock)
{
m = m.Where(i => _collection.AddDistinct(i)).ToArray();
}
if (m.Length == 0)
{
return;
}
await UserProxy.AddAsync(_type, _parent.AccountId, m).ConfigureAwait(false);
RaiseAccountDataUpdated(m, true);
}
