اون کار رو مستقیما نمی تونید انجام بدید، چون PersianCalendar جزو لیست تقویم های مجاز دات نت نیست. اما با استفاده از متد ActivatePersianCalendar در کلاس زیر می توانید تقویم شمسی را به تنظیمات Localization تزریق کنید. نتیجه همان چیزی خواهد بود که شما انتظار دارید.
using System;
using System.Collections.Generic;
using System.Text;
namespace PersianUtils
{
public class CalendarUtils
{
public static void ActivatePersianCalendar()
{
System.Globalization.CultureInfo calture = new System.Globalization.CultureInfo("fa-IR");
System.Globalization.DateTimeFormatInfo info = calture.DateTimeFormat;
info.AbbreviatedDayNames = new string[] { "ی", "د", "س", "چ", "پ", "ج", "ش" };
info.DayNames = new string[] { "یکشنبه", "دوشنبه", "ﺳﻪشنبه", "چهارشنبه", "پنجشنبه", "جمعه", "شنبه" };
info.AbbreviatedMonthNames = new string[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
info.MonthNames = new string[] { "فروردین", "اردیبهشت", "خرداد", "تیر", "مرداد", "شهریور", "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
info.AMDesignator = "ق.ظ";
info.PMDesignator = "ب.ظ";
info.ShortDatePattern = "dd/MM/yyyy";
info.LongDatePattern = "dd/MM/yyyy";
info.FirstDayOfWeek = DayOfWeek.Saturday;
System.Globalization.PersianCalendar cal = new System.Globalization.PersianCalendar();
typeof(System.Globalization.DateTimeFormatInfo).Ge tField("calendar", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).SetValue (info, cal);
object obj = typeof(System.Globalization.DateTimeFormatInfo).Ge tField("m_cultureTableRecord", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).GetValue (info);
obj.GetType().GetMethod("UseCurrentCalendar", System.Reflection.BindingFlags.NonPublic | System.Reflection.BindingFlags.Instance).Invoke(ob j, new object[] { cal.GetType().GetProperty("ID", System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).GetValue (cal, null) });
typeof(System.Globalization.CultureInfo).GetField( "calendar", System.Reflection.BindingFlags.Public | System.Reflection.BindingFlags.Instance | System.Reflection.BindingFlags.NonPublic).SetValue (calture, cal);
System.Threading.Thread.CurrentThread.CurrentCultu re = calture;
System.Threading.Thread.CurrentThread.CurrentUICul ture = calture;
System.Globalization.CultureInfo.CurrentCulture.Da teTimeFormat = info;
System.Globalization.CultureInfo.CurrentUICulture. DateTimeFormat = info;
}
}
}