Datetime - Persian calendar

Hi

As I know .net framework is supposed to support Persian calendar via DateTime Type. And there is tools to convert between different calendars inducing Persian calendar.

There is one problem storing 2 specific Persian dates in DateTime:

1. 1394/02/29 // yyyy/mm/dd

2. 1394/02/28 // yyyy/mm/dd

The yyyy part of date is not important. the problem is with 29th and 30th days of second month. It seems DateTime thinks that there is no 29th and 30th days in second month of Persian calendar which is "Oridibehesht"

This Problem exists in .Net framwork 4 and also SQL SERVER datetime2 type.

Is a bug or am I missing something?