public void Write(object instance, INodeWriter parentNode, Type referencedAsType) { var valueID = valuesCache.Add(instance); var typeName = typeNamesCache.GetTypeName(instance.GetType()); using (var arrayNode = ownerDocument.CreateArrayElement( typeName, valueID, parentNode)) { using (var itemsNode = ownerDocument.CreateItemsElement(arrayNode)) { foreach (var listItem in (IEnumerable)instance) { var itemType = listItem == null?instance.GetType().GetElementType() : listItem.GetType(); objectWriter.Write(listItem, itemsNode, itemType); } } } }