Expose Dictionary Keys in JsonDynamicObject

[MikeAlhayek]

We need a way to be able to iterate over the keys in the JsonDynamicObject. Exposing the Keys will allow us to do something like this

foreach(var key in dyanmicObj.Keys)
{
      var value = dyanmicObj.GetValue(key);
}

[MikeAlhayek]

Use GetDynamicMemberNames() instead

[gvkries]

GetDynamicMemberNames is for debugging only, when you need the keys you should use the JsonObject directly IMHO.