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LinkedList<T>.AddBefore Method (LinkedListNode<T>, T)

.NET Framework 4.5

Adds a new node containing the specified value before the specified existing node in the LinkedList<T>.

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

public LinkedListNode<T> AddBefore(
	LinkedListNode<T> node,
	T value
)

Parameters

node: Type: System.Collections.Generic.LinkedListNode<T>
The LinkedListNode<T> before which to insert a new LinkedListNode<T> containing value.

value: Type: T
The value to add to the LinkedList<T>.

Return Value

Type: System.Collections.Generic.LinkedListNode<T>
The new LinkedListNode<T> containing value.

Exceptions

Exception	Condition
ArgumentNullException	node is null.
InvalidOperationException	node is not in the current LinkedList<T>.

Remarks

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

This method is an O(1) operation.

Examples

The following code example and output demonstrate the AddBefore method. The code example finds the first node that has a particular value, and uses the AddBefore(LinkedListNode<T>, T) method overload to add two new nodes before it.

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

C++

// Indicate 'fox' node.
current = sentence.Find("fox");
IndicateNode(current, "Test 7: Indicate the 'fox' node:");

// Add 'quick' and 'brown' before 'fox':
sentence.AddBefore(current, "quick");
sentence.AddBefore(current, "brown");

Version Information

.NET Framework

Supported in: 4.5, 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

.NET for Windows Store apps

Supported in: Windows 8

Platforms

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.

Reference

LinkedList<T> Class

AddBefore Overload

System.Collections.Generic Namespace

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