Cast a hashtable.Keys into List or other IEnumerable

Question

I know, I have other options, e.g. I could maintain a separate list of keys. Please don\'t suggest other options. I simply want to know if I can pull this off. Please don\'t

Answer 1

Your foreach loop will throw an InvalidCastException if the Keys collection doesn't contain an int.

The cast to List fails because the compiler can't convert a non-generic ICollection to a specific ICollection