New Post: Unauthorized Exception when creating/deleting tasks

var taskDef = ts.NewTask();

taskDef.Settings.ExecutionTimeLimit = TimeSpan.FromMinutes(15);
taskDef.RegistrationInfo.Description = "My Task";

taskDef.Actions.Add(new ExecAction(
					Assembly.GetEntryAssembly().Location,
					"-myArgs"
				)
			);

string userId = string.Concat(Environment.UserDomainName, "\\", Environment.UserName);
TaskLogonType logonType;
if (ts.HighestSupportedVersion >= _v2)
{
	taskDef.Principal.RunLevel  = TaskRunLevel.LUA;
	taskDef.Principal.LogonType = logonType = TaskLogonType.S4U;
	taskDef.Principal.UserId    = userId;

	taskDef.Triggers.Add(GetTrigger(interval));

}
else // For Windows XP
{
	taskDef.Settings.RunOnlyIfLoggedOn = true;
	logonType = TaskLogonType.InteractiveToken;

	// Avoid System.ArgumentException: 
	//       Trigger.Repetition.Interval must be less than 
	//       Trigger.Repetition.Duration under Task Scheduler 1.0
	var trigger   = GetTrigger(interval);
	trigger.Repetition.Duration = trigger.Repetition.Interval.Add(TimeSpan.FromMinutes(1));
	trigger.Repetition.StopAtDurationEnd = false;
	taskDef.Triggers.Add(trigger);
}

var taskFolder = GetTaskFolder(ts);
taskFolder.RegisterTaskDefinition(
				taskName,
				taskDef,
				TaskCreation.CreateOrUpdate,
				userId,
				LogonType: logonType
			);
		
// Add this helper method		
private TaskFolder GetCeligoTaskFolder(TaskService ts)
{
	if (ts.HighestSupportedVersion >= _v2)
	{
		return ts.RootFolder
				 .SubFolders
				 .FirstOrDefault(f => f.Name == "MyTaskFolder")
				 ?? ts.RootFolder.CreateFolder("MyTaskFolder");
	}
	else
	{
		return ts.RootFolder;
	}
}