How to tell if a string is xml?

Question

We have a string field which can contain XML or plain text. The XML contains no header, and no root element, i.e. is not well formed.

We need t

Answer 1

try
{
    XmlDocument myDoc = new XmlDocument();
    myDoc.LoadXml(myString);
}
catch(XmlException ex)
{
    //take care of the exception
}