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LinkedList<T>.First Property

Gets the first node of the LinkedList<T>.

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

public LinkedListNode<T> First { get; }

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

If the LinkedList<T> is empty, the First and Last properties contain null.

Retrieving the value of this property is an O(1) operation.

The following code example and output demonstrate the First property. The code example inserts a node at the beginning of a linked list of nodes containing strings, uses the First property to mark the first element, then removes the element and adds it to the end of the list.

This code and output are part of a larger example provided for the LinkedList<T> class.


// Move the first node to be the last node.
LinkedListNode<string> mark1 = sentence.First;
sentence.RemoveFirst();
sentence.AddLast(mark1);


.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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