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POdynamic object - runtime reports field not present but can see it in debugger?
 

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    <p><strong>EDIT : restarting visual studio fixed this issue with no code changes.</strong></p> <hr> <p>I have a ConfigSection handler that uses dynamic types and an expando object. The test fails reporting <strong>'object' does not contain a definition for 'SportName'</strong>. I have tried to replicate in a console taking the ConfigSection handler out of the equation but what looks like the equivalent code works fine. I'm stumped.</p> <p>See below for test, ConfigurationSectionHandler and config xml</p> <pre><code>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&lt;XElement, string, string&gt;((x, atr) =&gt; x.Attribute(atr).Value); var getDictionary = new Func&lt;IEnumerable&lt;XElement&gt;, IDictionary&lt;string, string&gt;&gt;(elems =&gt; elems.ToDictionary(x =&gt; x.Attribute("name").Value, y =&gt; 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 =&gt; 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&lt;dynamic&gt; 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 =&gt; (string) x.SportName).First()); var eventProperties = sportList.First(x =&gt; x.SportName == "Baseball").EventProperties as IDictionary&lt;string, string&gt;; Assert.AreEqual(2, eventProperties.Count); Assert.AreEqual("BSB", eventProperties["SportId"]); Assert.AreEqual("THA", eventProperties["CompetitorReferenceId"]); var compProps = sportList.First(x =&gt; x.SportName == "Baseball").CompetitionProperties as IDictionary&lt;string, string&gt;; Assert.AreEqual(2, compProps.Count); Assert.AreEqual("BSB", compProps["SportId"]); Assert.AreEqual("CUP", compProps["CompetitionOrgMethodId"]); var mappedMarkets = (sportList.First(x =&gt; x.SportName == "Baseball").MappedMarkets as IEnumerable&lt;MappedMarket&gt;).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); } &lt;sportSettings&gt; &lt;sportList&gt; &lt;sport name="Baseball"&gt; &lt;eventProperties&gt; &lt;property name="SportId" value="BSB"&gt;&lt;/property&gt; &lt;property name="CompetitorReferenceId" value="THA"&gt;&lt;/property&gt; &lt;/eventProperties&gt; &lt;competitionProperties&gt; &lt;property name="SportId" value="BSB" /&gt; &lt;property name="CompetitionOrgMethodId" value="CUP" /&gt; &lt;/competitionProperties&gt; &lt;mapping&gt; &lt;market type="match_winner" mappedType="BSBAO" /&gt; &lt;market type="handicap" mappedType="BSBAQ" /&gt; &lt;/mapping&gt; &lt;/sport&gt; &lt;/sportList&gt; &lt;/sportSettings&gt; </code></pre> <p><strong>UPDATE</strong> - Stack Trace:</p> <pre><code>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.&lt;GoodConfig&gt;b__11(Object x) in C:\_Git\SS.Integration.EVenue\SS.Integration.EVenue.WindowsService.UnitTests\Configuration\SportSectionTests.cs:line 35 </code></pre>
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    1. USMyles McDonnell
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    1. COThe code looks correct, and you confirm it runs fine in the console. Try debugging the test, and 'tick' handled exceptions. Then start digging at the top of the callstack (show external code) by inspecting the locals.
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      1. USleppie
    2. COIf you mean tick 'Thrown' in Debug > Exception dialog then breaks at same point..have updated with call stack, thx
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    3. COYes, I mean that. Now when it breaks there, inspect the locals in the top 2 frames. You can also maybe inspect the IL from the assemblies to see if something is amiss.
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