Create XML subtree from string in LINQ?

Question

I want to modify all the text nodes using some functions in C#. I want to insert another xml subtree created from some string.

For example, I want to change this

<root>
this is a test
</root>

to

<root>
this is <subtree>another</subtree> test
</root>

I have this piece of code, but it inserts text node, I want to create xml subtree and insert that instead of plain text node.

List<XText> textNodes = element.DescendantNodes().OfType<XText>().ToList();
foreach (XText textNode in textNodes)
{
    String node = System.Text.RegularExpressions.Regex.Replace(textNode.Value, "a", "<subtree>another</subtree>");
    textNode.ReplaceWith(new XText(node));
}

Answer 1

You can split the original XText node into several, and add an XElement in between. Then you replace the original node with the three new nodes.

List<XNode> newNodes = Regex.Split(textNode.Value, "a").Select(p => (XNode) new XText(p)).ToList();

newNodes.Insert(1, new XElement("subtree", "another")); // substitute this with something better

textNode.ReplaceWith(newNodes);

Answer 2

I guess CreateDocumentFragment is much easier, though not LINQ, but the idea to use LINQ is ease only.