How do I add an XElement to a document, avoiding the "incorrectly structured document" error?
// Remove element with ID of 1 var userIds = from user in document.Descendants("Id") where user.Value == "1" select user; userIds.Remove(); SaveAndDisplay(document); // Add element back var newElement = new XElement("Id", "0", new XElement("Balance", "3000")); document.Add(newElement); SaveAndDisplay(document);
The add element back block is the problem. As when it gets to the add it states:
This operation would create an incorrectly structured document.
What stupid mistake am I making?
Yes, I was reading as an XDocument, not XElement. Any advice on when to favour one or the other?
It looks like you are trying to add a new element as a child of your document's root. If so, then you need to change your Add statement to the following.
var newElement = new XElement("Id", "0", new XElement("Balanace", "3000")); document.Root.Add(newElement);
Adding directly to the document adds another root element, which violates the XML structure.
You're effectively trying to add a new root element, which these objects don't like. I assume document is an XDocument? Place it further inside the root node, by adding it to the root node. Use:
document.Root.Add(newElement) or document.FirstNode.Add(newElement)