protected override ActivityExecutionStatus Execute(ActivityExecutionContext context)
{
    // Create an Outlook Application object. 
    Outlook.Application outlookApp = new Outlook.Application();

    Outlook._MailItem oMailItem = (Outlook._MailItem)outlookApp.CreateItem(Outlook.OlItemType.olMailItem);
    oMailItem.To = outlookApp.Session.CurrentUser.Address;
    oMailItem.Subject = "Auto-Reply";
    oMailItem.Body = "Out of Office";

    //adds it to the outbox  
    if (this.Parent.Parent is ParallelActivity)
    {
        if ((this.Parent.Parent.Parent.Activities[1] as DummyActivity).TitleProperty != "")
        {
            MessageBox.Show("Process Auto-Reply for Email");
            oMailItem.Send();
        }
    }
    else if (this.Parent.Parent is SequentialWorkflowActivity)
    {
        if ((this.Parent.Parent.Activities[1] as DummyActivity).TitleProperty != "")
        {
            MessageBox.Show("Process Auto-Reply for Email");
            oMailItem.Send();
        }
    }
    return ActivityExecutionStatus.Closed;
}