es doc内的list的字段与文档外的字段混合排序 C#

var script = " null != params._source.sortTime ? params._source.sortTime.toString() : (params._source.list instanceof ArrayList && params._source.list.length > 0 ? params._source.list[0].sortTime : '0')";

                        sort.Script(s => new ScriptSort
                        {
                            Order = SortOrder.Descending,
                            Script = new InlineScript(script),
                            Type = "string",
                        });