Type or namespace "XmlNode" could not be found
<p>I am getting the error "the type or namespace 'XmlNode' could not be found" even though I am using the following namespaces (including System.Xml):</p>

<pre><code>using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Xml;
using System.Xml.Linq;
using Windows.Data.Xml.Dom;
using Windows.Data.Xml.Xsl;
</code></pre>

<p>The curious thing is, <code>XmlNodeList</code> is coming up fine (shows up on IntelliSense). </p>

<p>I have tried all these "using" statements, and have tried changing the Target Platform to see if that would help for some reason (though I don't know why it would). </p>

<p>The app I am building is a UWP Windows App.</p>

<p>I recently updated Visual Studio -- could that be a factor? Does anybody have any insight on this? </p>