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POSystem.TypeLoadException when I try to convert JArray to an object in a thread
 

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    <p>I have a C# code that converts a JArray object <strong>jsonArray</strong> (JSON.Net) to a list of objects <strong>jsonList</strong> (List&lt; MyClass >):</p> <pre><code>List&lt;MyClass&gt; jsonList = jsonArray.ToObject&lt;List&lt;MyClass&gt;&gt; (); </code></pre> <p>The code above works fine when I run it on the main thread, but if I put the same code inside a different thread, like this:</p> <pre><code>Thread t = new Thread(delegate() { List&lt;MyClass&gt; jsonList = jsonArray.ToObject&lt;List&lt;MyClass&gt;&gt; (); }); t.Start(); </code></pre> <p>I get the following error message: "System.TypeLoadException has been thrown. A type load exception has occurred".</p> <p>Does anybody have any idea why this is happening? The full stack trace is below. Thanks in advance!</p> <blockquote> <p>System.TypeLoadException: A type load exception has occurred. at Newtonsoft.Json.Utilities.ThreadSafeStore<code>2[System.Type,System.Type].AddValue (System.Type key) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Utilities.ThreadSafeStore</code>2[System.Type,System.Type].Get (System.Type key) [0x00000] in :0 at Newtonsoft.Json.Serialization.JsonTypeReflector.GetAssociatedMetadataType (System.Type type) [0x00000] in :0 at Newtonsoft.Json.Serialization.JsonTypeReflector.GetAttribute[JsonContainerAttribute] (System.Type type) [0x00000] in :0 at Newtonsoft.Json.Serialization.JsonTypeReflector.GetAttribute[JsonContainerAttribute] (ICustomAttributeProvider attributeProvider) [0x00000] in :0 at Newtonsoft.Json.Utilities.ThreadSafeStore<code>2[System.Reflection.ICustomAttributeProvider,Newtonsoft.Json.JsonContainerAttribute].AddValue (ICustomAttributeProvider key) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Utilities.ThreadSafeStore</code>2[System.Reflection.ICustomAttributeProvider,Newtonsoft.Json.JsonContainerAttribute].Get (ICustomAttributeProvider key) [0x00000] in :0 at Newtonsoft.Json.Serialization.CachedAttributeGetter<code>1[Newtonsoft.Json.JsonContainerAttribute].GetAttribute (ICustomAttributeProvider type) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Serialization.JsonTypeReflector.GetJsonContainerAttribute (System.Type type) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Serialization.JsonTypeReflector.GetJsonObjectAttribute (System.Type type) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateContract (System.Type objectType) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Serialization.DefaultContractResolver.ResolveContract (System.Type type) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.GetContractSafe (System.Type type) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, Boolean checkAdditionalContent) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Linq.JToken.ToObject (System.Type objectType, Newtonsoft.Json.JsonSerializer jsonSerializer) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Linq.JToken.ToObject (System.Type objectType, Boolean isNullable) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Linq.JToken.ToObject (System.Type objectType) [0x00000] in &lt;filename unknown&gt;:0 at Newtonsoft.Json.Linq.JToken.ToObject[List</code>1] () [0x00000] in :0 at GuiaTV.AgoraController.GetJSON () [0x00015] in /Users/vegidio/Documents/Dev/Xamarin/GuiaTV/GuiaTV/Controllers/AgoraController.cs:24 at GuiaTV.AgoraScreen.m__2 () [0x0000d] in /Users/vegidio/Documents/Dev/Xamarin/GuiaTV/GuiaTV/Views/AgoraScreen.cs:43 at System.Threading.Thread.StartInternal () [0x0001d] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System.Threading/Thread.cs:697</p> </blockquote>
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    1. USvegidio
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    1. COYour problem could be related to this question: http://stackoverflow.com/questions/10112533/monotouch-with-newtonsoft-not-working
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    2. COThanks a lot, that helped. Apparently there's a specific version of JSON.Net that works with MonoTouch.
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