Dynamic object - the runtime report field is not present, but can see it in the debugger?

Question

EDIT: restarting visual studio fixed this problem without changing the code.

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I have a ConfigSection handler that uses dynamic types and an expando object. Testing is not responding. "object" does not contain a definition for "SportName" . I tried replicating in the console in which the ConfigSection handler got out of the equation, but the equivalent code seems to work fine. I'm at a dead end.

See below for test, ConfigurationSectionHandler and config xml

public class SportSection : IConfigurationSectionHandler { public object Create(object parent, object configContext, XmlNode section) { var doc = XDocument.Parse(section.OuterXml); var root = (XElement)doc.FirstNode; try { var sportList = root.Element("sportList").Elements("sport").Select(ToSport); dynamic config = new ExpandoObject(); config.SportList = sportList; return config; } catch (Exception ex) { throw new ConfigurationErrorsException("Invalid SportSection configuration", ex); } } private static dynamic ToSport(XElement sportElement) { try { var getAttrib = new Func<XElement, string, string>((x, atr) => x.Attribute(atr).Value); var getDictionary = new Func<IEnumerable<XElement>, IDictionary<string, string>>(elems => elems.ToDictionary(x => x.Attribute("name").Value, y => y.Attribute("value").Value)); return new { SportName = sportElement.Attribute("name").Value, EventProperties = getDictionary(sportElement.Element("eventProperties").Elements("property")), CompetitionProperties = getDictionary(sportElement.Element("competitionProperties").Elements("property")), MappedMarkets = sportElement.Element("mapping").Elements("market").Select(x => new MappedMarket() { Type = getAttrib(x, "type"), MappedType = getAttrib(x, "mappedType") }) }; } catch (Exception ex) { throw ex; } } } [Test] public void GoodConfig() { var document = new XmlDocument(); document.LoadXml(Resources.ValidSportSectionConfig); var config = new SportSection().Create(null, null, document) as dynamic; IEnumerable<dynamic> sportList = config.SportList; Assert.AreEqual(1, sportList.Count()); //Microsoft.CSharp.RuntimeBinder.RuntimeBinderException : 'object' does not contain a definition for 'SportName' Assert.AreEqual("Baseball", sportList.Select(x => (string) x.SportName).First()); var eventProperties = sportList.First(x => x.SportName == "Baseball").EventProperties as IDictionary<string, string>; Assert.AreEqual(2, eventProperties.Count); Assert.AreEqual("BSB", eventProperties["SportId"]); Assert.AreEqual("THA", eventProperties["CompetitorReferenceId"]); var compProps = sportList.First(x => x.SportName == "Baseball").CompetitionProperties as IDictionary<string, string>; Assert.AreEqual(2, compProps.Count); Assert.AreEqual("BSB", compProps["SportId"]); Assert.AreEqual("CUP", compProps["CompetitionOrgMethodId"]); var mappedMarkets = (sportList.First(x => x.SportName == "Baseball").MappedMarkets as IEnumerable<MappedMarket>).ToList(); Assert.AreEqual(2, mappedMarkets.Count()); Assert.AreEqual("match_winner" , mappedMarkets[0].Type); Assert.AreEqual("BSBAO", mappedMarkets[0].MappedType); Assert.AreEqual("handicap", mappedMarkets[0].Type); Assert.AreEqual("BSBAQ", mappedMarkets[0].MappedType); } <sportSettings> <sportList> <sport name="Baseball"> <eventProperties> <property name="SportId" value="BSB"></property> <property name="CompetitorReferenceId" value="THA"></property> </eventProperties> <competitionProperties> <property name="SportId" value="BSB" /> <property name="CompetitionOrgMethodId" value="CUP" /> </competitionProperties> <mapping> <market type="match_winner" mappedType="BSBAO" /> <market type="handicap" mappedType="BSBAQ" /> </mapping> </sport> </sportList> </sportSettings> 

UPDATE - Stack Trace:

 at CallSite.Target(Closure , CallSite , Object ) at System.Dynamic.UpdateDelegates.UpdateAndExecute1[T0,TRet](CallSite site, T0 arg0) at SS.Integration.EVenue.WindowsService.UnitTests.Configuration.SportSectionTests.<GoodConfig>b__11(Object x) in C:\_Git\SS.Integration.EVenue\SS.Integration.EVenue.WindowsService.UnitTests\Configuration\SportSectionTests.cs:line 35 

Answer 1

ToSport returns an anonymous type, not an ExpandoObject . You have to be careful when you apply an anonymous type to a dynamic one, because these types have an internal access modifier. Thus, if you cross the boundaries of the assembly, the runtime will not see any available properties. Try:

  private static dynamic ToSport(XElement sportElement) { try { var getAttrib = new Func<XElement, string, string>((x, atr) => x.Attribute(atr).Value); var getDictionary = new Func<IEnumerable<XElement>, IDictionary<string, string>>(elems => elems.ToDictionary(x => x.Attribute("name").Value, y => y.Attribute("value").Value)); dynamic n = new ExpandoObject(); n.SportName = sportElement.Attribute("name").Value; n.EventProperties = getDictionary(sportElement.Element("eventProperties").Elements("property")); n.CompetitionProperties = getDictionary(sportElement.Element("competitionProperties").Elements("property")); n.MappedMarkets = sportElement.Element("mapping").Elements("market").Select(x => new MappedMarket() { Type = getAttrib(x, "type"), MappedType = getAttrib(x, "mappedType") }); return n; } catch (Exception ex) { throw ex; } }