LinkedList<T>.AddFirst Method (LinkedListNode<T>)


Adds the specified new node at the start of the LinkedList<T>.

Namespace:   System.Collections.Generic
Assembly:  System (in System.dll)

public void AddFirst(
	LinkedListNode<T> node


Type: System.Collections.Generic.LinkedListNode<T>

The new LinkedListNode<T> to add at the start of the LinkedList<T>.

Exception Condition

node is null.


node belongs to another LinkedList<T>.

LinkedList<T> accepts null as a valid Value for reference types and allows duplicate values.

If the LinkedList<T> is empty, the new node becomes the First and the Last.

This method is an O(1) operation.

For an example that includes this method, see the LinkedList<T> class.

Universal Windows Platform
Available since 8
.NET Framework
Available since 2.0
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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