System.Xml.Linq.XDocumentType public class XDocumentType : XNode Documentation public string InternalSubset { get; set; } public string Name { get; set; } public string PublicId { get; set; } public string SystemId { get; set; } public XDocumentType(string name, string publicId, string systemId, string internalSubset) public XDocumentType(XDocumentType other)