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XNode.AddBeforeSelf Method (Object)

Adds the specified content immediately before this node.

Namespace:  System.Xml.Linq
Assembly:  System.Xml.Linq (in System.Xml.Linq.dll)

public void AddBeforeSelf(
	Object content
)

Parameters

content
Type: System.Object

A content object that contains simple content or a collection of content objects to be added before this node.

ExceptionCondition
InvalidOperationException

The parent is null.

For details about the valid content that can be passed to this method, see Valid Content of XElement and XDocument Objects.

This method will raise the Changed and the Changing events.

The XContainer stores its child nodes as a singly-linked list of XNode objects. This means that the AddBeforeSelf method must traverse the list of direct child nodes under the parent container. Therefore, using this method might affect your performance.

The following example uses this method to add an element into the tree.

XElement xmlTree = new XElement("Root",
    new XElement("Child1", 1),
    new XElement("Child2", 2),
    new XElement("Child3", 3),
    new XElement("Child4", 4),
    new XElement("Child5", 5)
);
XElement child1 = xmlTree.Element("Child1");
child1.AddBeforeSelf(
    new XElement("NewChild", 10)
);
Console.WriteLine(xmlTree);

This example produces the following output:

<Root>
  <NewChild>10</NewChild>
  <Child1>1</Child1>
  <Child2>2</Child2>
  <Child3>3</Child3>
  <Child4>4</Child4>
  <Child5>5</Child5>
</Root>

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, 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

.NET Compact Framework

Supported in: 3.5

XNA Framework

Supported in: 3.0

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