C# array get last item from split in one line

You can use IEnumerable.Last() extension method from System.Linq.

string lastItemOfSplit = aString.Split(new char[] {@"\"[0], "/"[0]}).Last();

Like by using the IEnumerable.Last() extension method? Include System.Linq and you'll have it.

You could always use LINQ:

string lastItem = aString.Split(...).Last();

Note that Enumerable.Last() is optimized when working on an IList<T> and you're not applying a predicate - so it's not even going to walk over the sequence to find the last one. (Not that it's likely to be an issue anyway.)