C # Chinese lunar calendar time

You have prepared to write it yourself.AlgorithmAnd study the lunar calendar rules. I found that it was too difficult and troublesome. Just for the calculation of the lunar calendar, I will wait for the people who specialize in calendar to understand it. Later I found out. Net Class Library also provides some basic lunar class system. Globalization. chineselunisolarcalendar. I modified the time format like datetime.CodeAs follows. Converts the Gregorian calendar to the lunar calendar. But it can only be counted as 1900 ~ Between 2100. It is enough for daily use.Source codeAs follows.
Using system;
Using system. Collections. Generic;
Using system. text;

Namespace System
...{
/** // <Summary>
/// Common Chinese calendar date and time
/// </Summary>
Class chinadatetime
...{
Private int year, month, dayofmonth;
Private bool isleap;
Public datetime time;

/** // <Summary>
/// Obtain the calendar year of the current date
/// </Summary>
Public int year
...{
Get... {return year ;}
}

/** // <Summary>
/// Obtain the calendar month of the current date
/// </Summary>
Public int month
...{
Get... {return month ;}
}

/** // <Summary>
/// Obtain the number of days in the current calendar month
/// </Summary>
Public int dayofmonth
...{
Get... {return dayofmonth ;}
}

/** // <Summary>
/// Obtain whether the current date is the date in the leap month
/// </Summary>
Public bool isleap
...{
Get... {return isleap ;}
}

System. Globalization. chineselunisolarcalendar cc;
/** // <Summary>
/// Return the Time of the specified Gregorian Calendar
/// </Summary>
/// <Param name = "time"> </param>
Public chinadatetime (datetime time)
...{
Cc = new system. Globalization. chineselunisolarcalendar ();
If (Time> cc. maxsupporteddatetime | time <cc. minsupporteddatetime)
Throw new exception ("the parameter date and time are not supported. Supported range:" + CC. minsupporteddatetime. toshortdatestring () + "to" + CC. maxsupporteddatetime. toshortdatestring ());
Year = cc. getyear (time );
Month = cc. getmonth (time );
Dayofmonth = cc. getdayofmonth (time );
Isleap = cc. isleapmonth (year, month );
If (isleap) month-= 1;
This. Time = time;

}

/** // <Summary>
/// Return the date of the current day.
/// </Summary>
Public static chinadatetime now
...{
Get... {return New chinadatetime (datetime. Now );}
}

/** // <Summary>
/// Returns whether the specified calendar year, month, or day is the lunar date and time of the leap month.
/// </Summary>
/// <Param name = "year"> </param>
/// <Param name = "month"> </param>
/// <Param name = "dayofmonth"> </param>
/// <Param name = "isleap"> </param>
Public chinadatetime (INT year, int month, int dayofmonth, bool isleap)
...{
If (Year> = cc. maxsupporteddatetime. Year | year <= cc. minsupporteddatetime. Year)
Throw new exception ("the parameter year time is not supported. Supported range:" + CC. minsupporteddatetime. toshortdatestring () + "to" + CC. maxsupporteddatetime. toshortdatestring ());

If (month <1 | month> 12)
Throw new exception ("the month must be 1 ~ 12 range ");
Cc = new system. Globalization. chineselunisolarcalendar ();
If (CC. getleapmonth (year )! = Month & isleap)
Throw new exception ("the specified month is not the leap month of the current year ");
If (CC. getdaysinmonth (year, isleap? Month + 1: month) <dayofmonth | dayofmonth <1)
Throw new exception ("the number of days in the specified month is not within the valid range of days in the current month ");
Year = year;
Month = month;
Dayofmonth = dayofmonth;
Isleap = isleap;
Time = datetime. now;
}

/** // <Summary>
/// Obtain the calendar time of the Current lunar date
/// </Summary>
Public datetime todatetime ()
...{
Return cc. todatetime (year, isleap? Month + 1: Month, dayofmonth, time. Hour, time. Minute, time. Second, time. millisecond );
}

/** //

// obtain the Gregorian calendar time corresponding to the specified Lunar Calendar time
///
///
//
Public static datetime todatetime (chinadatetime cntime)
... {
return cntime. todatetime ();
}

/** // <Summary>
/// Obtain the specified Gregorian calendar time and convert it to the lunar calendar time
/// </Summary>
/// <Param name = "time"> </param>
/// <Returns> </returns>
Public static chinadatetime tochinadatetime (datetime time)
...{
Return new chinadatetime (time );
}

/** // <Summary>