KeyedCollection<TKey, TItem>.ClearItems Method

Removes all elements from the KeyedCollection<TKey, TItem>.

Namespace:  System.Collections.ObjectModel
Assembly:  mscorlib (in mscorlib.dll)

protected override void ClearItems()

If there is a lookup dictionary, this method clears it but does not delete it.

If the number of elements has exceeded the dictionary creation threshold and the KeyedCollection<TKey, TItem> is using a lookup dictionary, it will continue to use a lookup dictionary even though the number of elements is again under the threshold.

This method is an O(n) operation, where n is Count.

Notes for Implementers

Override this method to provide customized behavior for the Clear method, inherited from the Collection<T> generic class.

Call the base class implementation of this method to clear the underlying collection and to clear the lookup dictionary.


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.