我正在使用ical.net进行日历订阅。 Here我完成并正常工作除了使用Google日历订阅时，所有活动都列为（无标题）。我发现Apple Calendar和Outlook使用日历事件的摘要作为其活动标题或名称，但我不确定Google使用的是什么，或者是否有解决方法或已知问题？
BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//ddaysoftware.com//NONSGML DDay.iCal 1.0//EN
BEGIN:VEVENT
DESCRIPTION:
DTEND:20170415T143000
DTSTAMP:20170504T235859Z
DTSTART:20170415T140000
LOCATION:123 Main St\, Lansing MI 48910
SEQUENCE:0
SUMMARY:Jane Doe - unconfirmed
UID:755dce86-be8d-4bd7-a93f-a108ec4d08b4
BEGIN:VALARM
ACTION:Display
SUMMARY:Upcoming appointment: Jane Doe - unconfirmed
TRIGGER:-PT1H
END:VALARM
END:VEVENT
BEGIN:VEVENT
DESCRIPTION:
DTEND:20170502T120000
DTSTAMP:20170504T235859Z
DTSTART:20170502T113000
LOCATION:123 Main St\, Lansing MI 48910
SEQUENCE:0
SUMMARY:Jane Doe - unconfirmed
UID:7eadb27e-0f07-4b94-aaf1-5b2aa23c5416
BEGIN:VALARM
ACTION:Display
SUMMARY:Upcoming appointment: Jane Doe - unconfirmed
TRIGGER:-PT1H
END:VALARM
END:VEVENT
BEGIN:VEVENT
DESCRIPTION:
DTEND:20170423T133000
DTSTAMP:20170504T235859Z
DTSTART:20170423T123000
LOCATION:564 side st\, Lansing MI 48911
SEQUENCE:0
SUMMARY:John Doe - unconfirmed
UID:a0f12654-7a77-491f-bfeb-7c80f7bd6b11
BEGIN:VALARM
ACTION:Display
SUMMARY:Upcoming appointment: John Doe - unconfirmed
TRIGGER:-PT1H
END:VALARM
END:VEVENT
END:VCALENDAR