CustomWorkflowsDemos

 public class GetDateTimeNow : CodeActivity
    {
        public static DependencyProperty DateTimeNowProperty = DependencyProperty.Register("DateTimeNow", typeof(DateTime), typeof(GetDateTimeNow));

        [Output("Date and Time Now")]
        public OutArgument<DateTime> DateTimeNow
        {
            get;
            set;
        }

        protected override void Execute(CodeActivityContext context)
        {
            DateTimeNow.Set(context, DateTime.Now);
        }
    }