Gets all the keys in the NameValueCollection.
Assembly: System (in System.dll)
If the collection is empty, this method returns an empty String array, not null.
The arrays returned by InvalidateCachedArrays, thereby forcing the arrays to be recreated.are cached for better performance and are automatically refreshed when the collection changes. A derived class can invalidate the cached version by calling
This method is an O(n) operation, where n is Count.
Available since 10
Available since 1.1