Properly Update an XmlNode within an XmlDocument

[zi007ad]

I have been waging war with XmlDocuments all day. They are winning. I am building a component in .net 2.0 and am therefore forced to use it. Please take a look at this and help me regain some sanity:\[code\] private static string UpdateMeterAccessXml(string meterAccess, int childToUpdate, string field, string value) { var doc = new XmlDocument(); doc.LoadXml(meterAccess); var xpath = String.Format("/items/item[{0}]/{1}", childToUpdate, field); var modNode = doc.SelectSingleNode(xpath); modNode.InnerText = value; doc.ReplaceChild(modNode, doc.SelectSingleNode(xpath)); return doc.OuterXml; }\[/code\]doc.ReplaceChild yields an ArgumentException ("The node to be removed is not a child of this node.")I thought that since an XmlDocument was a reference type I wouldn't have to try to swap out nodes, but if I just update the InnerText of the Node I want, doc.OuterXml doesn't reflect the change.