为什么iCal.Net生成的时间无效？

var timeZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
var startDate = new DateTime(2022, 1, 1, 10, 0, 0);
var endDate = new DateTime(2022, 1, 1, 12, 0, 0);
var event = new CalendarEvent
{
    Start = new CalDateTime(startDate, timeZone),
    End = new CalDateTime(endDate, timeZone),
    // 其他事件属性...
};

var startDate = new DateTime(2022, 1, 1, 10, 0, 0);
var endDate = new DateTime(2022, 1, 1, 12, 0, 0);
var event = new CalendarEvent
{
    Start = new CalDateTime(startDate.ToString("yyyyMMddTHHmmss")),
    End = new CalDateTime(endDate.ToString("yyyyMMddTHHmmss")),
    // 其他事件属性...
};