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LinkedListNode(Of T) Class

Represents a node in a LinkedList(Of T). This class cannot be inherited.

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

'Declaration
<ComVisibleAttribute(False)> _
Public NotInheritable Class LinkedListNode(Of T)
'Usage
Dim instance As LinkedListNode(Of T)

Type Parameters

T

Specifies the element type of the linked list.

Each element of the LinkedList(Of T) collection is a LinkedListNode(Of T). The LinkedListNode(Of T) contains a value, a reference to the LinkedList(Of T) that it belongs to, a reference to the next node, and a reference to the previous node.

The following code example creates a LinkedListNode(Of T), adds it to a LinkedList(Of T), and tracks the values of its properties as the LinkedList(Of T) changes.

Imports System
Imports System.Collections.Generic

Public Class GenericCollection

    Public Shared Sub Main()

        ' Create a new LinkedListNode of type String and displays its properties. 
        Dim lln As New LinkedListNode(Of String)("orange")
        Console.WriteLine("After creating the node ....")
        DisplayProperties(lln)

        ' Create a new LinkedList. 
        Dim ll As New LinkedList(Of String)

        ' Add the "orange" node and display its properties.
        ll.AddLast(lln)
        Console.WriteLine("After adding the node to the empty LinkedList ....")
        DisplayProperties(lln)

        ' Add nodes before and after the "orange" node and display the "orange" node's properties.
        ll.AddFirst("red")
        ll.AddLast("yellow")
        Console.WriteLine("After adding red and yellow ....")
        DisplayProperties(lln)

    End Sub 'Main

    Public Shared Sub DisplayProperties(lln As LinkedListNode(Of String))

        If lln.List Is Nothing Then
            Console.WriteLine("   Node is not linked.")
        Else
            Console.WriteLine("   Node belongs to a linked list with {0} elements.", lln.List.Count)
        End If  

        If lln.Previous Is Nothing Then
            Console.WriteLine("   Previous node is null.")
        Else
            Console.WriteLine("   Value of previous node: {0}", lln.Previous.Value)
        End If 

        Console.WriteLine("   Value of current node:  {0}", lln.Value)

        If lln.Next Is Nothing Then
            Console.WriteLine("   Next node is null.")
        Else
            Console.WriteLine("   Value of next node:     {0}", lln.Next.Value)
        End If 

        Console.WriteLine()

    End Sub 'DisplayProperties 

End Class 'GenericCollection


'This code produces the following output. 

'After creating the node .... 
'   Node is not linked. 
'   Previous node is null. 
'   Value of current node:  orange 
'   Next node is null. 

'After adding the node to the empty LinkedList .... 
'   Node belongs to a linked list with 1 elements. 
'   Previous node is null. 
'   Value of current node:  orange 
'   Next node is null. 

'After adding red and yellow .... 
'   Node belongs to a linked list with 3 elements. 
'   Value of previous node: red 
'   Value of current node:  orange 
'   Value of next node:     yellow

System.Object
  System.Collections.Generic.LinkedListNode(Of T)

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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