Fixing Optional Calendars for Persian Culture in .NET

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Globalization;
using System.Reflection;

namespace FixPersianLocale
{
    public partial class Sample : Form
    {
        private CultureInfo m_culture;
        public Sample()
        {
            m_culture = new CultureInfo("fa-IR");
            System.Threading.Thread.CurrentThread.CurrentCulture = m_culture;
            System.Threading.Thread.CurrentThread.CurrentUICulture = m_culture;

            InitializeComponent();
            
        }

        void Log(string format, params object[] Params)
        {
            string str = string.Format(format, Params);
            textBox1.AppendText(str); 
        }
        private void Sample_Load(object sender, EventArgs e)
        {

        }

        private void Test1()
        {
            CultureInfo cultureInfo = new CultureInfo("fa-IR",false);
            DateTimeFormatInfo dateTimeFormatInfo = cultureInfo.DateTimeFormat;
            Console.WriteLine("DateTime.Now={0}", DateTime.Now);
 
        }

        private void linkLabel1_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Log("DateTime.Now={0} \r\n", DateTime.Now);
        }

        private void linkLabel2_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Log("Now.ToString(m_culture) = {0} \r\n", DateTime.Now.ToLongDateString());
        }
        private void SetCurrentCulture(CultureInfo culture)
        {
            System.Threading.Thread.CurrentThread.CurrentCulture = culture;
            System.Threading.Thread.CurrentThread.CurrentUICulture = culture;

        }

        private void linkLabel3_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            PersianCultureHelper.FixPersianCulture(m_culture, FixCultureOptions.foptAll);
            
            Log("Current culture fixed with all options. \r\n");


        }
        private void printCulture()
        {
            m_culture = System.Threading.Thread.CurrentThread.CurrentCulture;
            Log("Culture Data: \r\n");
            Log("============ \r\n");
            Log("Culture Name={0} \r\n", m_culture.Name);
            Log("Culture Display Name={0} \r\n", m_culture.DisplayName);
            Log("Culture Calendar={0} \r\n", m_culture.Calendar);
            Log("Culture.DateTimeFormat.Calendar={0} \r\n", m_culture.DateTimeFormat.Calendar);


            Log("Optional Calendars: \r\n");
            foreach (Calendar cal in m_culture.OptionalCalendars)
            {
                Log("\t Calendar {0} \r\n", cal);

            }
            Log("Month Names: \r\n");
            foreach (string m in m_culture.DateTimeFormat.MonthNames)
            {
                Log("\t {0} \r\n", m);
            }
            Log("Day Names: \r\n");
            foreach (string m in m_culture.DateTimeFormat.DayNames)
            {
                Log("\t {0} \r\n", m);
            }

            Log("============ \r\n");
        }

        private void linkLabel4_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            printCulture();
 

        }

        private void linkLabel5_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            Log("Now.ToShortString = {0} \r\n", DateTime.Now.ToShortDateString());

        }

        private void linkLabel6_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            //m_culture =  PersianCultureHelper.FixAndSetCurrentCulture();
            m_culture.DateTimeFormat.Calendar = new System.Globalization.GregorianCalendar();
            SetCurrentCulture(m_culture);

            

            //CultureInfo cultureInfo = new CultureInfo("fa-IR", false);
            //DateTimeFormatInfo dateTimeFormatInfo = cultureInfo.DateTimeFormat;

            //FieldInfo cultureDataField = typeof(CultureInfo).GetField("m_cultureData",
            //     BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            //Object cultureData = cultureDataField.GetValue(cultureInfo);
            //FieldInfo waCalendarsField = cultureData.GetType().GetField("waCalendars",
            //    BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
            //int[] waCalendars = (int[])waCalendarsField.GetValue(cultureData);
            //waCalendarsField.SetValue(cultureData, waCalendars);
            //waCalendars[0] = 0x16;
            //waCalendarsField.SetValue(cultureData, waCalendars); 

            //dateTimeFormatInfo.Calendar = new PersianCalendar(); 



            //FieldInfo calendarField = typeof(DateTimeFormatInfo).GetField("calendar",
            //                            BindingFlags.Public |  BindingFlags.NonPublic |  BindingFlags.Instance );
            //calendarField.SetValue(dateTimeFormatInfo, new PersianCalendar());

            //dateTimeFormatInfo.DayNames = new string[] 
            //    { "یکشنبه", "دوشنبه", "ﺳﻪشنبه", "چهارشنبه", "پنجشنبه", "جمعه", "شنبه" };
            //dateTimeFormatInfo.AbbreviatedMonthNames = new string[] 
            //    { "فروردین", "ارديبهشت", "خرداد", "تير", "مرداد", "شهریور", 
            //        "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };
            //dateTimeFormatInfo.MonthNames = new string[] 
            //    { "فروردین", "ارديبهشت", "خرداد", "تير", "مرداد", "شهریور", 
            //        "مهر", "آبان", "آذر", "دی", "بهمن", "اسفند", "" };

           // Log("To day is {0}", DateTime.Now.ToString("dddd, dd MMM yyyy", dateTimeFormatInfo));

        }
        private void ClearLog()
        {
            textBox1.Text = "";
        }

        private void linkLabel7_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            ClearLog();
            m_culture = PersianCultureHelper.FixPersianCulture(null, FixCultureOptions.foptCalendarInDateFormatInfo);

            SetCurrentCulture(m_culture);
            Log("DateTimeFormat of current culture fixed: \r\n");
            printCulture();


        }

        private void linkLabel8_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            ClearLog();
            m_culture = PersianCultureHelper.FixAndSetCurrentCulture();
            Log("Current culture fixed: \r\n");
            printCulture();
        }

        private void linkLabel9_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            textBox1.Text = "";
        }

        private void linkLabel3_LinkClicked_1(object sender, LinkLabelLinkClickedEventArgs e)
        {
            m_culture.DateTimeFormat.Calendar = new System.Globalization.GregorianCalendar();
            SetCurrentCulture(m_culture);
        }

        private void linkLabel6_LinkClicked_1(object sender, LinkLabelLinkClickedEventArgs e)
        {
            try
            {
                m_culture.DateTimeFormat.Calendar = new System.Globalization.PersianCalendar();
                Log("Calendar changed to PersianCalendar. \r\n");
            }
            catch(ArgumentOutOfRangeException)
            {
                Log("Persian Calendar is not in set of optional calendars. You should fix the culture first. \r\n");
            }
        }

        private void linkLabel10_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            ClearLog();
            m_culture = FixPersianLocale.PersianCultureHelper.FixPersianCulture(m_culture, FixCultureOptions.foptOptionalCalendars);
            Log("Optional calendars fixed: \r\n");
            printCulture();
 
        }

        private void linkLabel11_LinkClicked(object sender, LinkLabelLinkClickedEventArgs e)
        {
            ClearLog();
            Log("Creating custom Persian Culture \r\n");
            if (FixPersianLocale.PersianCultureHelper.CreateAndRegisterCustomPersianLocale())
                Log("Custom culture for 'fa-IR' successfuly created and registered.\r\nNow you can use new CultureInfo('fa-IR', false) to instantiate a new fixed Persian Cuture.\r\n");
            else
                Log("Failed to create and register custom Persian culture.\r\n");

        }

    }
}