XML LINQ VB.Net

Imports System
Imports System.Xml
Imports System.Xml.XPath
Public Class MainClass
    Public Shared Sub Main()
        Dim srcTree As XElement = _ 
                
                    1
                    2
                    3
                    4
                    5
                

        
        Dim xmlTree As XElement = _ 
                
                    1
                    2
                    3
                    4
                    5
                

        
        xmlTree.AddFirst(New XElement("NewChild", "new content"))
        xmlTree.AddFirst( _
            From el In srcTree.Elements() _
            Where CInt(el) > 3 _
            Select el _
        )
        xmlTree.AddFirst(srcTree.)
        Console.WriteLine(xmlTree)
    End Sub
End Class