protected override ImmutableSortedDictionary <TKey, TValue> SetValues(ImmutableSortedDictionary <TKey, TValue> values, ref ArraySegment <KeyValuePair <TKey, TValue> > newValues, ISerializationContext context)
{
if (newValues.Count == 1)
{
var pair = newValues.Singleton();
return(values.SetItem(pair.Key, pair.Value));
}
return(values.SetItems(newValues));
}