When would you not use Generic Collections?

Question

The advantage of using generics is that it increases the type safety - you can only put in the correct type of thing, and you get out the correct type without requiring a ca

Answer 1

The non-generic Collection in the Microsoft.VisualBasic namespace has some annoying quirks and goofiness, and is in a lot of ways pretty horrible, but it also has a unique feature: it is the only collection which exhibits sensible semantics if it's modified during an enumeration; code which does something like delete all members of a Collection which meet a certain predicate may need to be significantly rewritten if some other collection type is used.