public void Save([NotNull] XmlTextWriter output)
{
Assert.ArgumentNotNull(output, nameof(output));
output.WriteStartElement("validation");
output.WriteAttributeString("type", ((int)Type).ToString());
output.WriteAttributeString("severity", ((int)Severity).ToString());
output.WriteElementCData("code", Code);
output.WriteElementString("category", Category);
output.WriteElementString("title", Title);
output.WriteElementCData("problem", Problem);
output.WriteElementCData("solution", Solution);
output.WriteElementCData("fix", Fix);
output.WriteElementCData("whenexists", WhenExists ? "true" : "false");
output.WriteEndElement();
}