Linq to XML infanticide - Is there a simple expedient way to promote grandchildren to replace children?

Question

Consider the following snippet ``` using System; using System.Xml.Linq; class Program { static void Main() { var family = XDocument.Parse("

"); var usurper = family.Root.Descendants("g"); family.Root.Element("c").Remove(); family.Root.Add(usurper); Console.WriteLine(family.ToString()); Console.ReadKey(); } } ``` The output I get is `@"

"` but I would like `@"

"`. I can see why it happens and, there is a justice to it but, its not the output I need. If I change the the order of the lines to ``` var usurper = family.Root.Descendants("g"); family.Root.Add(usurper); family.Root.Element("c").Remove(); ``` a circular relationship is set up and the remove eventualy causes an OutOfMemoryException. Is there a simple, expedient way to make this work? EDIT The fix I actually implemented was ``` var usurper = family.Root.Descendants("g").Single(); family.Root.Element("c").Remove(); family.Root.Add(usurper); ``` Excuse my blushes.

Accepted Answer

Try doing this instead

```
var usurper = family.Root.Descendants("g").ToList();
```

You have to force the enumeration to yield a result due to lazy evaluation, otherwise you get an empty result.

Linq to XML infanticide - Is there a simple expedient way to promote grandchildren to replace children?

Solution

Problem