XNode.AddBeforeSelf Method (Object)
Adds the specified content immediately before this node.
Assembly: System.Xml.Linq (in System.Xml.Linq.dll)
The parent is a null reference (Nothing in Visual Basic).
For details about the valid content that can be passed to this method, see Valid Content of XElement and XDocument Objects.
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.
This example produces the following output:
Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, 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.