Serializing/Deserializing JSON in Dynamics CRM 2013/2015 Plugin

Question

I am developing a plugin for Dynamics 2015. The plugin requires some setup information which I thought would be a good idea to use a json object in the unsecure configuration. Also, there's an external system which is writing some json into a field in the entity that this plugin responds to which I need to extract information from.

I have tried to use JavascriptSerializer object to deserialize the json but I get a System.MethodAccessException, upon doing some research, I have found out that I can't use the JavascriptSerializer in sandbox mode.

I don't want to have to ILMerge Json.Net into my assembly, so is there any other way I can serialize/deserialize json in my plugin code?

Answer 1

So here's how I solved this one

Given

 string wsData = string.Empty;
 plItem.GetType() == typeof(CategoryInfo);

and

 [DataContract]
 public class CategoryInfo{
    [DataMember]
    public string AllPropertiesToSerialize{ get; set; }
 }  

then

using (var ms = new MemoryStream())
{
     var js = new DataContractJsonSerializer(typeof(CategoryInfo));
     js.WriteObject(ms, plItem);
     ms.Position = 0;
     var sr = new StreamReader(ms);
     wsData = sr.ReadToEnd();
}

Thanks to @dbc and @Guido Preite for the pointers