How to efficiently return the first and last item in a SortedList<> in C#?

Question

My question is like the following question but with SortedList<Tkey, TValue> instead of just the original SortedList.

Return first element in SortedList in C#

There doesn't seem to be a function like GetKey().

Answer 1

You can simply use list.FirstOrDefault() and list.LastOrDefault().

These two methods will return default(KeyValuePair<TKey,TValue>) if the list is empty.

And it's better to use them because using list.First() and list.Last() will throw error in case the list was empty.