XContainer.AddFirst Method

 
System_CAPS_noteNote

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Adds the specified content as the first children of this document or element.

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

NameDescription
System_CAPS_pubmethodAddFirst(Object)

Adds the specified content as the first children of this document or element.

System_CAPS_pubmethodAddFirst(Object())

Adds the specified content as the first children of this document or element.

This method adds the new content before the existing content of the XContainer.

For details about the valid content that can be passed to this function, see Valid Content of XElement and XDocument Objects1.

This method will raise the Changed and the Changing events.

The following example creates two XML trees, and then uses this method to add the results of a query to one of them.


                Dim srcTree As XElement = _ 
        <Root>
            <Element1>1</Element1>
            <Element2>2</Element2>
            <Element3>3</Element3>
            <Element4>4</Element4>
            <Element5>5</Element5>
        </Root>
Dim xmlTree As XElement = <Root>
                              <NewElement>Content</NewElement>
                          </Root>
xmlTree.AddFirst( _
    From el In srcTree.Elements _
    Where CInt(el) >= 3 _
    Select el)
Console.WriteLine(xmlTree)

This example produces the following output:


                <Root>
  <Element3>3</Element3>
  <Element4>4</Element4>
  <Element5>5</Element5>
  <NewElement>Content</NewElement>
</Root>
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