Persian Calendar Problem with CultureInfo
<p>What's wrong with this code?</p>

<pre><code>        //Error(Exception) Message : Not a valid calendar for the given culture.
        System.Globalization.CultureInfo ci = new System.Globalization.CultureInfo("fa-Ir");
        ci.DateTimeFormat.Calendar = new System.Globalization.PersianCalendar();
        Application.CurrentCulture = ci;
</code></pre>

<p>and what's its solution?
Can i add a Calendar type to windows XP regional option ? 
:)</p>
