Prevent DTD download when parsing XML

.net, c#, xml

Solution

After some more digging, maybe you should set the XmlResolver property of the XmlReaderSettings object to null.

'The XmlResolver is used to locate and open an XML instance document, or to locate and open any external resources referenced by the XML instance document. This can include entities, DTD, or schemas.'

So the code would look like this:

        XmlReaderSettings settings = new XmlReaderSettings();
        settings.XmlResolver = null;
        settings.DtdProcessing = DtdProcessing.Parse;
        XmlDocument doc = new XmlDocument();
        using (StringReader sr = new StringReader(xml))
            using (XmlReader reader = XmlReader.Create(sr, settings))
            {
                doc.Load(reader);
            }

Problem

When using XmlDocument.Load , I am finding that if the document refers to a DTD, a connection is made to the provided URI. Is there any way to prevent this from happening?

Original source