KeyedCollection(Of TKey, TItem).GetKeyForItem Method
When implemented in a derived class, extracts the key from the specified element.
Assembly: mscorlib (in mscorlib.dll)
If the key in the lookup dictionary is different from the key that is embedded in item, you cannot access item by using the key returned by .
This method is an O(1) operation.
Notes for Implementers
You must override this method to provide the dictionary with a way to extract keys from items in the dictionary.
This method is called internally. It is not necessary for it to be public.
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