BenyBlack's Personal Blog

 Dim xmlTree As XElement = _
        <root>
            <child1>child1 content</child1>
            <child2>child2 content</child2>
            <child3>child3 content</child3>
            <child4>child4 content</child4>
            <child5>child5 content</child5>
        </root>

 Dim child3 As XElement = xmlTree.<child3>(0)
 child3.ReplaceWith(<newchild>new content</newchild>)
 Console.WriteLine(xmlTree)

<Root>
  <Child1>child1 content</Child1>
  <Child2>child2 content</Child2>
  <NewChild>new content</NewChild>
  <Child4>child4 content</Child4>
  <Child5>child5 content</Child5>
</Root>