Install-Package PersianTools.Core

dotnet add package PersianTools.Core

var persianDate1 = new PersianDateTime(1399, 10, 13); // 1
var persianDate2 = new PersianDateTime("1399/10/13"); // 2
var persianDate3 = new PersianDateTime("1399/12/29 23:30"); // 3
var persianDate4 = new PersianDateTime("1399/12/29 23:30:00"); // 4
var persianDate5 = new PersianDateTime(1399, 12, 29, 23, 30, 10); // 5
var persianDate6 = new PersianDateTime(DateTime.Now); // 6

var dt1 = new PersianDateTime("1401/02/13").GetDateInformation();

Output:
[
  {
    "id": "61-10-02",
    "description": "تعطیل به مناسبت عید سعید فطر",
    "calenderType": 2,
    "dateType": 3,
    "isHoliDay": true,
    "calenderTypeDesc": "قمری",
    "dateTypeDesc": "تعطیل رسمی"
  }
]

var dt1 = new PersianDateTime("1401/02/15").GetDateInformation();

Output:
[
  {
    "id": "1-02-15",
    "description": "روز بزرگداشت شیخ صدوق",
    "calenderType": 1,
    "dateType": 4,
    "isHoliDay": false,
    "calenderTypeDesc": "شمسی",
    "dateTypeDesc": "مناسبت ملی"
  },
  {
    "id": "1-02-15",
    "description": "جشن میانه بهار ، جشن بهاربد",
    "calenderType": 1,
    "dateType": 4,
    "isHoliDay": false,
    "calenderTypeDesc": "شمسی",
    "dateTypeDesc": "مناسبت ملی"
  },
  {
    "id": "1-02-15",
    "description": "روز شیراز",
    "calenderType": 1,
    "dateType": 4,
    "isHoliDay": false,
    "calenderTypeDesc": "شمسی",
    "dateTypeDesc": "مناسبت ملی"
  },
  {
    "id": "1-05-05",
    "description": "روز جهانی ماما",
    "calenderType": 3,
    "dateType": 5,
    "isHoliDay": false,
    "calenderTypeDesc": "میلادی",
    "dateTypeDesc": "مناسبت بین المللی"
  }
]

var dt1 = new PersianDateTime("1399/12/29");
var dt2 = new PersianDateTime("1399/11/29");
Convert.ToInt32(dt1.DateDifference(dt2));

Output: 30

var dt1 = new PersianDateTime("1399/12/29 23:30:20");
var start = dt1.ShamsiStartDateTimeOfDay();

Output:
1399/12/29 00:00:00

var dt1 = new PersianDateTime("1399/12/29 23:30:20");
var end = dt1.ShamsiEndDateTimeOfDay();

Output:
1399/12/29 23:59:59

var d1 = PersianDateTime.ShamsiEndDateTimeOfPersianYear(1397);

Output:
1397/12/29

var d2 = PersianDateTime.ShamsiEndDateTimeOfPersianYear(1399);

Output:
1399/12/30

var d1 = PersianDateTime.ShamsiEndDateTimeOfMonth(1397, 12);

Output:
1397/12/29

var d2 = PersianDateTime.ShamsiEndDateTimeOfMonth(1399, 12);

Output:
1399/12/30

var d1 = new PersianDateTime(1397, 8, 1);
var d2 = new PersianDateTime(1397, 8, 30);
PersianDateExtensions.GetWorkingDays(d1,d2);

Output:
20

PersianDateExtensions.GetWorkingDays(d1,d2, true); // با احتساب روزهای پنجشنبه غیر تعطیل

Output:
23

var result = PersianDateExtensions.GetContinuousHolidays(year, 3);

Output:
[Item1: 1400/03/13 - 1400/03/16, Item2: ...]

int price = 11200000;
string faPrice = PersianTools.Core.CharacterUtil.Convert(price).Replace(" ", "");

Output:
یازده میلیون و دویست هزار

var nationalCode = "0032546580";
var validate = nationalCode.IsValidNationalCode();

Output:
True