Check for the existence of an item in the List

Question

There is a List <string> lst

How to check if lst [1] exists?

Maxim Kamalov Maxim Kamalov 1.407 9 silver marks 22 bronze marks · Accepted Answer · 2013-03-17T09:13:05

if (lst != null && lst.Count > 1 && lst[1] != null) { // код }

Maxim Kamalov

1.407 9 silver marks 22 bronze marks

one
Check lst[1] not necessarily necessary: it is not clear that there is "exists" in the vehicle. Check lst != null is harmful, because it does not distinguish the normal situation (the list is empty) from the non-fulfillment of the contract (lst == null). I would write this: if (lst == null) throw new ArgumentException ("appropriate description"); bool hasAtIndex1 = lst. Count> 1; - VladD

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