Converting HijriCalendar to Gregorian in Xamarin forms - datetime

Question

I am trying to convert HijriCalendar to Gregorian Calendar in Xamarin Forms app. However, it seems that Xamarin Android is not happy with it. I haven't test it in Xamarin iOS.
I am using code from Cannot convert from Hijri Date to Gregorian date (c#)
and I am getting below exception when instantiating the HijriCalendar object in line
DTFormat.Calendar = new System.Globalization.HijriCalendar(); //exception is thrown
{System.ArgumentOutOfRangeException: Not a valid calendar for the
given culture. Parameter name: value at
System.Globalization.DateTimeFormatInfo.set_Calendar
(System.Globalization.Calendar value) [0x00142]
I have checked Converting Dates between Calendars in Xamarin.Android solution, but that suggests another library which I am not interested to use.
I have changed the Linking properties in Android Project to None, Sdk Assemblyies Only, and Sdk & User Assembly but didn't worked. So, how to convert Gregorian Date to HijriDate in Xamarin forms?
I also added the following codes in OnCreate method in Xamarin Android from Thai crash: Not a valid calendar for the given culture
_ = new System.Globalization.GregorianCalendar();
_ = new System.Globalization.HijriCalendar();
_ = new System.Globalization.PersianCalendar();
_ = new System.Globalization.UmAlQuraCalendar();
_ = new System.Globalization.ThaiBuddhistCalendar();

Answer 1

Try to use System.DateTime:
Calendar hijiri = new HijriCalendar();
DateTime date = new DateTime(1442, 4, 15, hijiri);
Console.WriteLine(date.Year); // 2020
Console.WriteLine(date.Month);//11
Console.WriteLine(date.Day); // 30
Calendar gregorian = new GregorianCalendar();
DateTime d = new DateTime(2020, 11, 30, gregorian);
var year = hijiri.GetYear(d); //1442
var month = hijiri.GetMonth(d); //4
var day = hijiri.GetDayOfMonth(d); //15
and another way is using NodaTime.

Answer 2

I found simular problem on this link
https://github.com/xamarin/Xamarin.Forms/issues/4037
// These classes won't be linked away because of the code,
// but we also won't have to construct unnecessarily either,
// hence the if statement with (hopefully) impossible
// runtime condition.
//
// This is to resolve crash at CultureInfo.CurrentCulture
// when language is set to Thai. See
// https://github.com/xamarin/Xamarin.Forms/issues/4037
if (Environment.CurrentDirectory == "_never_POSSIBLE_")
{
new System.Globalization.ChineseLunisolarCalendar();
new System.Globalization.HebrewCalendar();
new System.Globalization.HijriCalendar();
new System.Globalization.JapaneseCalendar();
new System.Globalization.JapaneseLunisolarCalendar();
new System.Globalization.KoreanCalendar();
new System.Globalization.KoreanLunisolarCalendar();
new System.Globalization.PersianCalendar();
new System.Globalization.TaiwanCalendar();
new System.Globalization.TaiwanLunisolarCalendar();
new System.Globalization.ThaiBuddhistCalendar();
new System.Globalization.UmAlQuraCalendar();
}
Good luck!