Calendar Properties should be prior to any calendar component

[Unrud]

From https://tools.ietf.org/html/rfc5545#section-3.7:

   They SHOULD be specified after the "BEGIN:VCALENDAR"
   delimiter string and prior to any calendar component.

Unfortunately Outlook seems to ignore properties that are specified after components: Kozea/Radicale#697 (comment)

Test

import vobject
s="""\
BEGIN:VCALENDAR
X-WR-CALNAME:test
BEGIN:VEVENT
END:VEVENT
END:VCALENDAR
"""
print(vobject.readOne(s).serialize())

Result:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//PYVOBJECT//NONSGML Version 1//EN
BEGIN:VEVENT
UID:20170905T152211Z - 65144@laptop
DTSTAMP:20170905T152211Z
END:VEVENT
X-WR-CALNAME:test
END:VCALENDAR

The calendar property X-WR-CALNAME is specified after the calendar component VEVENT.