How to get IDictionaryEnumerator from generic IDictionary?

Question

I have a dictionary as follows:

  IDictionary<string, string> dict;

How to create an enumerator that implements IDictionaryEnumerator (preferably using linq)?

Answer 1

Must be missing something here, what about:

IDictionary obsoleteDict = dict as IDictionary;
if (obsoleteDict == null)
{
 //Do something here...
}
else
{
 return obsoleteDict.GetEnumerator();
}

(edit: yep, you have to cast it to the old non-generic interface)

edit2: see Pavel's comment below. A type implementing IDictionary<K,V> may or may not implement IDictionary (Dictionary<K,V> does while some implementations like WCF's MessageProperties do not) so the cast may not work.