C#后台list转化为json格式

public ActionResult GetData()
{
var lst = new List<Model.calendarevent>();
lst.Add(new Model.calendarevent
{
allDay = true,
confid = 1,
confname = "工作",
confshortname = "M1",
description = "",
end = "2018-12-14 08:30:00",
start = "2018-12-14 08:00:00",
fullname = "开会",
id = 1,
noteType = 1,
sid = 2,
title = "记事簿",
topic = "记事簿",
uid = 3
});
return Json(lst, JsonRequestBehavior.AllowGet);
}

写一个model，直接把需要字段添加到model里面，返回这个就行