XmlDocument type not found even though I've referenced System.XML?

Question

I\'ve referenced System.Xml:

using System.Xml;

Then in this line:

XmlDocument xdoc = new XmlDocument();

I

Answer 1

I know that the question is already answered, but I want to add the solution for the very similar problem that I had, which might help others:

In my case it was a simple misspelling, well, not even that, it was an uppercase-lowercase-fault:
There are 2 classes: XMLDocument (from msxml.h) and XmlDocument (from System.Xml).
Make sure that you're not mixing them up! ;-)