## mark a section (Learn more)

using System; using System.Collections.Generic; using System.Dynamic; using System.Linq; using System.Linq.Expressions; using System.Xml.Linq; namespace DynamicXMLReader { public class DynamicXmlMetaObject : DynamicMetaObject { public DynamicXmlMetaObject(Expression expression, XNode node) : base(expression, BindingRestrictions.GetInstanceRestriction(expression, node), node) {} private DynamicXmlMetaObject(Expression expression, BindingRestrictions bindingRestrictions, XNode node) : base(expression, bindingRestrictions, node) {} public override DynamicMetaObject BindGetMember(GetMemberBinder binder) { Func<XAttribute, bool> attributeNameMatchPredicate = a => String.Equals(a.Name.LocalName,binder.Name,StringComparison.CurrentCultureIgnoreCase); Func<XElement, bool> elementNameMatchPredicate = e => String.Equals(e.Name.LocalName,binder.Name,StringComparison.CurrentCultureIgnoreCase); if (Value is XDocument) { var asDoc = Value as XDocument; return asDoc.Descendants().Count(elementNameMatchPredicate) == 1 ? DynamicXmlReaderForSingleElement(asDoc.Descendants().Single(elementNameMatchPredicate)) : ArrayOfDynamicsByContext(asDoc.Descendants().Where(elementNameMatchPredicate)); } if (Value is XElement) { //if attribute, bind it to a string //if text with no children, bind it to a string //if neither, but it exists as an aggregate, bind it to the aggregate var asElem = Value as XElement; if(asElem.Attributes().Any(attributeNameMatchPredicate)) return StringForFirstAttribute(asElem, attributeNameMatchPredicate); if (ElementContainsAtLeastOneMatchingElement(elementNameMatchPredicate, asElem)) { var subElems = asElem.Elements().Where(elementNameMatchPredicate); if (subElems.Count() == 1) return subElems.First().HasElements ? DynamicXmlReaderForSingleElement(subElems.First()) : StringForValue(subElems.First()); return ArrayOfDynamicsByContext(subElems); } } throw new NotImplementedException(); } private static DynamicMetaObject ArrayOfDynamicsByContext(IEnumerable<XElement> subElems) { var xmlReaderArray = subElems.Select<XElement, object>(e => e.HasElements ? (dynamic) new DynamicXmlReader(e) : (dynamic) e.Value ).ToArray(); var target = Expression.Constant(xmlReaderArray); return new DynamicMetaObject(target, BindingRestrictions.GetTypeRestriction(target, typeof(dynamic[])), xmlReaderArray); } private static DynamicMetaObject StringForValue(XElement subElem) { var value = subElem.Value; var target = Expression.Constant(value); return new DynamicMetaObject(target, BindingRestrictions.GetTypeRestriction(target, typeof(string)), value); } private static bool ElementContainsAtLeastOneMatchingElement(Func<XElement, bool> elementNameMatchPredicate, XElement asElem) { return asElem.HasElements && asElem.Elements().Any(elementNameMatchPredicate); } private static DynamicMetaObject StringForFirstAttribute(XElement asElem, Func<XAttribute, bool> attributeNameMatchPredicate) { var value = asElem.Attributes().First(attributeNameMatchPredicate).Value; var target = Expression.Constant(value); return new DynamicMetaObject(target, BindingRestrictions.GetTypeRestriction(target, typeof(string)), value); } private static DynamicMetaObject DynamicXmlReaderForSingleElement(XElement elem) { var target = Expression.Constant(new DynamicXmlReader(elem)); return new DynamicXmlMetaObject(target, BindingRestrictions.GetTypeRestriction(target, typeof(DynamicXmlReader)), elem); } } public class DynamicXmlReader : IDynamicMetaObjectProvider { private readonly XNode _internalNode; internal DynamicXmlReader(XNode node) { _internalNode = node; } public DynamicMetaObject GetMetaObject(Expression expression) { return new DynamicXmlMetaObject(expression, _internalNode);; } public static dynamic Parse(string someXml) { var xdoc = XDocument.Parse(someXml); return new DynamicXmlReader(xdoc); } } }

This paste will be private.