How to check for valid xml in string input before calling .LoadXml()

Question

I would much prefer to do this without catching an exception in LoadXml() and using this results as part of my logic. Any ideas for a solution that doesn\'t in

Answer 1

I was unable to get XmlValidatingReader & ValidationEventHandler to work. The XmlException is still thrown for incorrectly formed xml. I verified this by viewing the methods with reflector.

I indeed need to validate 100s of short XHTML fragments per second.

public static bool IsValidXhtml(this string text)
{
   bool errored = false;
   var reader = new XmlValidatingReader(text, XmlNodeType.Element, new XmlParserContext(null, new XmlNamespaceManager(new NameTable()), null, XmlSpace.None));
   reader.ValidationEventHandler += ((sender, e) => { errored = e.Severity == System.Xml.Schema.XmlSeverityType.Error; });

   while (reader.Read()) { ; }
   reader.Close();
   return !errored;
}

XmlParserContext did not work either.

Anyone succeed with a regex?