Question

I’m looking at the interface IDictionary<T, U>. One weird thing I noted in the list of methods that must be implemented is CopyTo with the description:

Copies the elements of the ICollection to an Array, starting at a
particular Array index.

What does this even mean in the context of a dictionary? Does this mean copy the values to the array or the keys or KeyValuePairs or what?

Answer 1

Since IDictionary<TKey, TValue> implements ICollection<KeyValuePair<TKey, TValue> and the CopyTo method’s type the generic parameter for the ICollection<T> interface it will return an array of KeyValuePair<TKey, TValue> objects.