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

Are you perhaps working inside a SilverLight project?

Only time I have experienced this was when starting out in SilverLight, I did not realise that not all of the System.XML was in the Silverlight CLR version. I used System.Linq.XML instead.

Answer 2

I know this is a very old question but the problem persists nowadays. I'm on a Xamarin.Forms project and the PCL project targets a profile (Profile111) that doesn't support XmlDocument. I had to use System.Xml.Linq.XDocument. My projects targets WindowsPhone and XmlDocument doesn't exist on this target.

Answer 3

If you're using Visual Studio Code, you need to include the .NET Standard package from NuGet. You can also just include the System.Xml.XmlDocument package directly if that's all you need.

Answer 4

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! ;-)

Answer 5

Make sure your project references the System.Xml.dll assembly. It's possible that you're referencing a different assembly that contains other System.Xml.* classes and that might be why you're seeing the System.Xml namespace but without the classes you need.

If you already have this reference, try removing and re-adding it and see if that irons out some weird VS glitch.