Closed Issue: Unsetting a trigger's end boundary in UI does not reset the trigger's EndBoundary property [10778]

using Microsoft.Win32.TaskScheduler.dll v1.9.2

Let's assume I configure a scheduled task this way, with an end boundary set on the trigger.
I get the following output :

```
Name : test
Enabled : True
LastRunTime : 01/01/0001 00:00:00
LastTaskResult : 0
State : Unknown
IsActive : False
NextRunTime : 01/01/0001 00:00:00
Should have run : 22/01/2013 09:00:00
Trigger #1:
Start boundary : 15/01/2013 09:00:00
End boundary : 22/01/2013 00:00:00
```

notice that IsActive and NextRunTime are correct as the trigger is deactivated because of the passed end boundary date

now when I unset this end boundary date from Trigger#1 :

```
Name : test
Enabled : True
LastRunTime : 01/01/0001 00:00:00
LastTaskResult : 0
State : Unknown
IsActive : False
NextRunTime : 30/01/2013 09:00:00
Should have run : 22/01/2013 09:00:00
Trigger #1: à 09:00 tous les jours, début : 15/01/2013
Start boundary : 15/01/2013 09:00:00
End boundary : 22/01/2013 00:00:00
```

IsActive still returns False, EndBoundary still returns the same date (and it shouldn't)
but NextRunTime is correct !

Hope this helps
LV
Comments: Confirmed this to be a problem with Windows XP.