DocumentElement.AppendChild throws object reference not set to an instance of an object

c#, c#-4.0, xml, xmldocument

Solution

You haven't document element yet, because the only child you've been added is a declaration. Replace

doc.DocumentElement.AppendChild(rootnode);

with:

doc.AppendChild(rootnode);

Problem

I'm trying to create a new xml file, write data into it and than save. Here is the code: ``` XmlDocument doc= new XmlDocument(); XmlDeclaration dec = doc.CreateXmlDeclaration("1.0", null, null); doc.AppendChild(dec); XmlElement rootnode = doc.CreateElement("Root"); foreach (var item in list) { XmlElement parent = ordersNIA.CreateElement("ParentElement"); XmlElement childOne = ordersNIA.CreateElement("childOne"); childOne.InnerText = "This is the first child"; parent.AppendChild(childOne); XmlElement childTwo = ordersNIA.CreateElement("childTwo"); childOne.InnerText = "This is the second child"; parent.AppendChild(childTwo); XmlElement childThree = ordersNIA.CreateElement("childThree"); childOne.InnerText = "This is the third child"; parent.AppendChild(childThree); rootnode.AppendChild(parent); } doc.DocumentElement.AppendChild(rootnode); doc.Save("xmlDocument.xml"); ``` the line `doc.DocumentElement.AppendChild(rootnode);` is the line that throws the "object reference not set to an instance of an object" I've been looking on internet but I don't seem to find an answer to why this error is being thrown. When I check the rootnode I see it's innerHTML completely filled with my xml so that seems to be correct. I don't see any null-objects but maybe I'm missing something Any help is much appreciated.

Original source