有些实现，例如IEnumerable<obj>.DistinctBy(o => o.Prop)，将通过特殊的Property支持.

There are some implementations like IEnumerable<obj>.DistinctBy(o => o.Prop) which will support distinct by a special Property.

以下内容也适用

list.GroupBy(l => l.Property).Select(group => group.First())