Newtonsoft.Json.JsonWriter.WriteNull C# (CSharp) Method

        public virtual void WriteNull()
        {
            InternalWriteValue(JsonToken.Null);
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            var request = value as UpdateListItemsRequest;
            if (request == null)
            {
                writer.WriteNull();
                return;
            }
            /*
             "additems" : ["3","4","5"],
            "adduniqueitems" : ["1","6"],
            "removeitems": ["2","5"]
             */
            writer.WriteStartObject();
            writer.WritePropertyName(request.Property );
            writer.WriteStartObject();
            if (request.ItemsToAdd.Count > 0)
            {
                if (request.AddUniquely == true)
                    writer.WriteArray("adduniqueitems", request.ItemsToAdd);
                else
                    writer.WriteArray("additems", request.ItemsToAdd);
            }
            if (request.ItemsToRemove.Count > 0)
                writer.WriteArray("removeitems", request.ItemsToRemove);

            writer.WriteEndObject();
            writer.WriteEndObject();
        }