protected override object InternalTryGetValue(PropertyBag.BasicPropertyStore propertyBag)
{
string valueOrDefault = propertyBag.GetValueOrDefault <string>(InternalSchema.ItemClass);
if (valueOrDefault == null)
{
return(RecurrenceType.None);
}
if (ObjectClass.IsTask(valueOrDefault) || ObjectClass.IsTaskRequest(valueOrDefault))
{
if (propertyBag.GetValueOrDefault <bool>(InternalSchema.IsOneOff))
{
return(RecurrenceType.None);
}
byte[] valueOrDefault2 = propertyBag.GetValueOrDefault <byte[]>(InternalSchema.TaskRecurrence);
return(RecurrenceTypeProperty.GetTaskRecurrenceTypeFromBlob(valueOrDefault2));
}
else
{
if (ObjectClass.IsCalendarItemCalendarItemOccurrenceOrRecurrenceException(valueOrDefault) || ObjectClass.IsMeetingMessage(valueOrDefault))
{
return(propertyBag.GetValueOrDefault <RecurrenceType>(InternalSchema.MapiRecurrenceType));
}
return(RecurrenceType.None);
}
}
private static RecurrenceType GetTaskRecurrenceTypeFromBlob(byte[] blob)
{
if (blob == null)
{
return(RecurrenceType.None);
}
RecurrenceType result;
try
{
TaskRecurrence taskRecurrence = InternalRecurrence.InternalParseTask(blob, null, null, null);
result = RecurrenceTypeProperty.TaskRecurrencePatternToRecurrenceType(taskRecurrence);
}
catch (RecurrenceFormatException)
{
result = RecurrenceType.None;
}
return(result);
}