/// <summary>
/// The method can be called to clear all current property values in the calendar. The version is left
/// unchanged.
/// </summary>
/// <remarks>Because time zone information is shared amongst all calendars, the <see cref="TimeZones"/>
/// collection will not be cleared. If you want it cleared, you must do it manually.</remarks>
public override void ClearProperties()
{
prodId = null;
calScale = null;
method = null;
geo = null;
tz = null;
daylight = null;
events = null;
todos = null;
journals = null;
freebusy = null;
customProps = null;
}
/// <summary>
/// This is overridden to allow copying of the additional properties
/// </summary>
/// <param name="p">The PDI object from which the settings are to be copied</param>
protected override void Clone(PDIObject p)
{
VCalendar o = (VCalendar)p;
this.ClearProperties();
prodId = (ProductIdProperty)o.ProductId.Clone();
calScale = (CalendarScaleProperty)o.CalendarScale.Clone();
method = (MethodProperty)o.Method.Clone();
geo = (GeographicPositionProperty)o.VCalendarGeographicPosition.Clone();
tz = (TimeZoneProperty)o.VCalendarTimeZone.Clone();
daylight = (DaylightProperty)o.VCalendarDaylightRule.Clone();
this.Events.CloneRange(o.Events);
this.ToDos.CloneRange(o.ToDos);
this.Journals.CloneRange(o.Journals);
this.FreeBusys.CloneRange(o.FreeBusys);
this.CustomProperties.CloneRange(o.CustomProperties);
}