Resets the cached arrays of the collection to null.
Assembly: System (in System.dll)
The arrays returned by AllKeys are cached for better performance and are automatically refreshed when the collection changes. A derived class can invalidate the cached version by calling , thereby forcing the arrays to be recreated.
This method is an O(1) operation.
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.