Collection with Next()

Question

How can I get next element of element to which I have reference in some collection e.g. List<T> ?

I am not talking about any loops, etc. I want get just one next (or previous) element

Answer 1

A collection does not have the a concept of "current element". Iterators/Enumerators do. And they have a MoveNext() method. And then you can access the current element of that enumerator with Current.

You can call GetEnumerator() on almost all collections to get an enumerator.

One problem with enumerators is you usually can't copy them nor move them backwards. (Unlike C++ where most collections have more powerful iterators)