如何使用实体框架按日期分组，而不是按时间分组

mycode:

mycode的：

//get data
        var myData = from log in db.OperationLogs
                     group log by log.CreateTime.Date  into g
                     orderby g.Key
                     select new { CreateTime = g.Key, Count = g.Count() };
//get data
        var myD