LinkedList.AddBefore Method (Generic LinkedListNode, Generic LinkedListNode)
Assembly: System (in system.dll)
The LinkedListNode before which to insert newNode.
The new LinkedListNode to add to the LinkedList.
LinkedList accepts a null reference (Nothing in Visual Basic) as a valid Value for reference types and allows duplicate values.
This method is an O(1) operation.
The following code example and output demonstrate the AddBefore method. The code example begins by marking the existing node containing "fox". The code then finds the node containing "dog" and attempts to use the AddBefore(Generic LinkedListNode,Generic LinkedListNode) method overload to add "fox" before "dog", without first removing "fox" from the list. This causes an InvalidOperationException, which is caught. The code example then removes "fox" and uses the AddBefore(Generic LinkedListNode,Generic LinkedListNode) method overload to add it before "dog". Finally, the code example removes "dog" and inserts it at the location formerly occupied by "fox".
This code and output are part of a larger example provided for the LinkedList class.
Windows 98, Windows Server 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.