How to delete specific nodes from an XElement?

Question

I have created a XElement with node which has XML as below.

I want to remove all the \"Rule\" nodes if they contain \"conditions\" node.

Answer 1

You can use Linq:

xRelation.Elements()
     .Where(el => el.Elements("Conditions") == null)
     .Remove();

Or create a copy of the nodes to delete, and delete them after (in case the first method doesn't work):

List nodesToDelete = xRelation.Elements().Where(el => el.Elements("Conditions") == null).ToList();

foreach (XElement el in nodesToDeletes)
{
    // Removes from its parent, but not nodesToDelete, so we can use foreach here
    el.Remove();
}