# System.Globalization

``` diff
+namespace System.Globalization {
+    public abstract class Calendar {
+        public const int CurrentEra = 0;
+        protected Calendar();
+        public virtual CalendarAlgorithmType AlgorithmType { get; }
+        protected virtual int DaysInYearBeforeMinSupportedYear { get; }
+        public abstract int[] Eras { get; }
+        public bool IsReadOnly { get; }
+        public virtual DateTime MaxSupportedDateTime { get; }
+        public virtual DateTime MinSupportedDateTime { get; }
+        public virtual int TwoDigitYearMax { get; set; }
+        public virtual DateTime AddDays(DateTime time, int days);
+        public virtual DateTime AddHours(DateTime time, int hours);
+        public virtual DateTime AddMilliseconds(DateTime time, double milliseconds);
+        public virtual DateTime AddMinutes(DateTime time, int minutes);
+        public abstract DateTime AddMonths(DateTime time, int months);
+        public virtual DateTime AddSeconds(DateTime time, int seconds);
+        public virtual DateTime AddWeeks(DateTime time, int weeks);
+        public abstract DateTime AddYears(DateTime time, int years);
+        public abstract int GetDayOfMonth(DateTime time);
+        public abstract DayOfWeek GetDayOfWeek(DateTime time);
+        public abstract int GetDayOfYear(DateTime time);
+        public virtual int GetDaysInMonth(int year, int month);
+        public abstract int GetDaysInMonth(int year, int month, int era);
+        public virtual int GetDaysInYear(int year);
+        public abstract int GetDaysInYear(int year, int era);
+        public abstract int GetEra(DateTime time);
+        public virtual int GetHour(DateTime time);
+        public virtual int GetLeapMonth(int year, int era);
+        public virtual double GetMilliseconds(DateTime time);
+        public virtual int GetMinute(DateTime time);
+        public abstract int GetMonth(DateTime time);
+        public virtual int GetMonthsInYear(int year);
+        public abstract int GetMonthsInYear(int year, int era);
+        public virtual int GetSecond(DateTime time);
+        public virtual int GetWeekOfYear(DateTime time, CalendarWeekRule rule, DayOfWeek firstDayOfWeek);
+        public abstract int GetYear(DateTime time);
+        public virtual bool IsLeapDay(int year, int month, int day);
+        public abstract bool IsLeapDay(int year, int month, int day, int era);
+        public virtual bool IsLeapMonth(int year, int month);
+        public abstract bool IsLeapMonth(int year, int month, int era);
+        public virtual bool IsLeapYear(int year);
+        public abstract bool IsLeapYear(int year, int era);
+        public virtual DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond);
+        public abstract DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public virtual int ToFourDigitYear(int year);
+    }
+    public enum CalendarAlgorithmType {
+        LunarCalendar = 2,
+        LunisolarCalendar = 3,
+        SolarCalendar = 1,
+        Unknown = 0,
+    }
+    public enum CalendarWeekRule {
+        FirstDay = 0,
+        FirstFourDayWeek = 2,
+        FirstFullWeek = 1,
+    }
+    public static class CharUnicodeInfo {
+        public static double GetNumericValue(char ch);
+        public static double GetNumericValue(string s, int index);
+        public static UnicodeCategory GetUnicodeCategory(char ch);
+        public static UnicodeCategory GetUnicodeCategory(string s, int index);
+    }
+    public class ChineseLunisolarCalendar : EastAsianLunisolarCalendar {
+        public const int ChineseEra = 1;
+        public ChineseLunisolarCalendar();
+        protected override int DaysInYearBeforeMinSupportedYear { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int GetEra(DateTime time);
+    }
+    public class CompareInfo {
+        public virtual string Name { get; }
+        public virtual int Compare(string string1, int offset1, int length1, string string2, int offset2, int length2);
+        public virtual int Compare(string string1, int offset1, int length1, string string2, int offset2, int length2, CompareOptions options);
+        public virtual int Compare(string string1, int offset1, string string2, int offset2);
+        public virtual int Compare(string string1, int offset1, string string2, int offset2, CompareOptions options);
+        public virtual int Compare(string string1, string string2);
+        public virtual int Compare(string string1, string string2, CompareOptions options);
+        public override bool Equals(object value);
+        public static CompareInfo GetCompareInfo(string name);
+        public override int GetHashCode();
+        public virtual int GetHashCode(string source, CompareOptions options);
+        public virtual int IndexOf(string source, char value);
+        public virtual int IndexOf(string source, char value, CompareOptions options);
+        public virtual int IndexOf(string source, char value, int startIndex, CompareOptions options);
+        public virtual int IndexOf(string source, char value, int startIndex, int count);
+        public virtual int IndexOf(string source, char value, int startIndex, int count, CompareOptions options);
+        public virtual int IndexOf(string source, string value);
+        public virtual int IndexOf(string source, string value, CompareOptions options);
+        public virtual int IndexOf(string source, string value, int startIndex, CompareOptions options);
+        public virtual int IndexOf(string source, string value, int startIndex, int count);
+        public virtual int IndexOf(string source, string value, int startIndex, int count, CompareOptions options);
+        public virtual bool IsPrefix(string source, string prefix);
+        public virtual bool IsPrefix(string source, string prefix, CompareOptions options);
+        public virtual bool IsSuffix(string source, string suffix);
+        public virtual bool IsSuffix(string source, string suffix, CompareOptions options);
+        public virtual int LastIndexOf(string source, char value);
+        public virtual int LastIndexOf(string source, char value, CompareOptions options);
+        public virtual int LastIndexOf(string source, char value, int startIndex, CompareOptions options);
+        public virtual int LastIndexOf(string source, char value, int startIndex, int count);
+        public virtual int LastIndexOf(string source, char value, int startIndex, int count, CompareOptions options);
+        public virtual int LastIndexOf(string source, string value);
+        public virtual int LastIndexOf(string source, string value, CompareOptions options);
+        public virtual int LastIndexOf(string source, string value, int startIndex, CompareOptions options);
+        public virtual int LastIndexOf(string source, string value, int startIndex, int count);
+        public virtual int LastIndexOf(string source, string value, int startIndex, int count, CompareOptions options);
+        public override string ToString();
+    }
+    public enum CompareOptions {
+        IgnoreCase = 1,
+        IgnoreKanaType = 8,
+        IgnoreNonSpace = 2,
+        IgnoreSymbols = 4,
+        IgnoreWidth = 16,
+        None = 0,
+        Ordinal = 1073741824,
+        OrdinalIgnoreCase = 268435456,
+        StringSort = 536870912,
+    }
+    public class CultureInfo : IFormatProvider {
+        public CultureInfo(string name);
+        public virtual Calendar Calendar { get; }
+        public virtual CompareInfo CompareInfo { get; }
+        public static CultureInfo CurrentCulture { get; set; }
+        public static CultureInfo CurrentUICulture { get; set; }
+        public virtual DateTimeFormatInfo DateTimeFormat { get; set; }
+        public static CultureInfo DefaultThreadCurrentCulture { get; set; }
+        public static CultureInfo DefaultThreadCurrentUICulture { get; set; }
+        public virtual string DisplayName { get; }
+        public virtual string EnglishName { get; }
+        public static CultureInfo InvariantCulture { get; }
+        public virtual bool IsNeutralCulture { get; }
+        public bool IsReadOnly { get; }
+        public virtual string Name { get; }
+        public virtual string NativeName { get; }
+        public virtual NumberFormatInfo NumberFormat { get; set; }
+        public virtual Calendar[] OptionalCalendars { get; }
+        public virtual CultureInfo Parent { get; }
+        public virtual TextInfo TextInfo { get; }
+        public virtual string TwoLetterISOLanguageName { get; }
+        public virtual object Clone();
+        public override bool Equals(object value);
+        public virtual object GetFormat(Type formatType);
+        public override int GetHashCode();
+        public static CultureInfo ReadOnly(CultureInfo ci);
+        public override string ToString();
+    }
+    public class CultureNotFoundException : ArgumentException {
+        public CultureNotFoundException();
+        public CultureNotFoundException(string message);
+        public CultureNotFoundException(string message, Exception innerException);
+        public CultureNotFoundException(string paramName, string message);
+        public CultureNotFoundException(string message, string invalidCultureName, Exception innerException);
+        public CultureNotFoundException(string paramName, string invalidCultureName, string message);
+        public virtual string InvalidCultureName { get; }
+        public override string Message { get; }
+    }
+    public sealed class DateTimeFormatInfo : IFormatProvider {
+        public DateTimeFormatInfo();
+        public string[] AbbreviatedDayNames { get; set; }
+        public string[] AbbreviatedMonthGenitiveNames { get; set; }
+        public string[] AbbreviatedMonthNames { get; set; }
+        public string AMDesignator { get; set; }
+        public Calendar Calendar { get; set; }
+        public CalendarWeekRule CalendarWeekRule { get; set; }
+        public static DateTimeFormatInfo CurrentInfo { get; }
+        public string[] DayNames { get; set; }
+        public DayOfWeek FirstDayOfWeek { get; set; }
+        public string FullDateTimePattern { get; set; }
+        public static DateTimeFormatInfo InvariantInfo { get; }
+        public bool IsReadOnly { get; }
+        public string LongDatePattern { get; set; }
+        public string LongTimePattern { get; set; }
+        public string MonthDayPattern { get; set; }
+        public string[] MonthGenitiveNames { get; set; }
+        public string[] MonthNames { get; set; }
+        public string PMDesignator { get; set; }
+        public string RFC1123Pattern { get; }
+        public string ShortDatePattern { get; set; }
+        public string[] ShortestDayNames { get; set; }
+        public string ShortTimePattern { get; set; }
+        public string SortableDateTimePattern { get; }
+        public string UniversalSortableDateTimePattern { get; }
+        public string YearMonthPattern { get; set; }
+        public object Clone();
+        public string GetAbbreviatedDayName(DayOfWeek dayofweek);
+        public string GetAbbreviatedEraName(int era);
+        public string GetAbbreviatedMonthName(int month);
+        public string GetDayName(DayOfWeek dayofweek);
+        public int GetEra(string eraName);
+        public string GetEraName(int era);
+        public object GetFormat(Type formatType);
+        public static DateTimeFormatInfo GetInstance(IFormatProvider provider);
+        public string GetMonthName(int month);
+        public static DateTimeFormatInfo ReadOnly(DateTimeFormatInfo dtfi);
+    }
+    public enum DateTimeStyles {
+        AdjustToUniversal = 16,
+        AllowInnerWhite = 4,
+        AllowLeadingWhite = 1,
+        AllowTrailingWhite = 2,
+        AllowWhiteSpaces = 7,
+        AssumeLocal = 32,
+        AssumeUniversal = 64,
+        NoCurrentDateDefault = 8,
+        None = 0,
+        RoundtripKind = 128,
+    }
+    public abstract class EastAsianLunisolarCalendar : Calendar {
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public int GetCelestialStem(int sexagenaryYear);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public virtual int GetSexagenaryYear(DateTime time);
+        public int GetTerrestrialBranch(int sexagenaryYear);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public static class GlobalizationExtensions {
+        public static StringComparer GetStringComparer(this CompareInfo compareInfo, CompareOptions options);
+    }
+    public class GregorianCalendar : Calendar {
+        public const int ADEra = 1;
+        public GregorianCalendar();
+        public GregorianCalendar(GregorianCalendarTypes type);
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        public virtual GregorianCalendarTypes CalendarType { get; set; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public enum GregorianCalendarTypes {
+        Arabic = 10,
+        Localized = 1,
+        MiddleEastFrench = 9,
+        TransliteratedEnglish = 11,
+        TransliteratedFrench = 12,
+        USEnglish = 2,
+    }
+    public class HebrewCalendar : Calendar {
+        public HebrewCalendar();
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public class HijriCalendar : Calendar {
+        public HijriCalendar();
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        protected override int DaysInYearBeforeMinSupportedYear { get; }
+        public override int[] Eras { get; }
+        public int HijriAdjustment { get; set; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public sealed class IdnMapping {
+        public IdnMapping();
+        public bool AllowUnassigned { get; set; }
+        public bool UseStd3AsciiRules { get; set; }
+        public override bool Equals(object obj);
+        public string GetAscii(string unicode);
+        public string GetAscii(string unicode, int index);
+        public string GetAscii(string unicode, int index, int count);
+        public override int GetHashCode();
+        public string GetUnicode(string ascii);
+        public string GetUnicode(string ascii, int index);
+        public string GetUnicode(string ascii, int index, int count);
+    }
+    public class JapaneseCalendar : Calendar {
+        public JapaneseCalendar();
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetWeekOfYear(DateTime time, CalendarWeekRule rule, DayOfWeek firstDayOfWeek);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public class JapaneseLunisolarCalendar : EastAsianLunisolarCalendar {
+        public const int JapaneseEra = 1;
+        public JapaneseLunisolarCalendar();
+        protected override int DaysInYearBeforeMinSupportedYear { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int GetEra(DateTime time);
+    }
+    public class JulianCalendar : Calendar {
+        public static readonly int JulianEra;
+        public JulianCalendar();
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public class KoreanCalendar : Calendar {
+        public const int KoreanEra = 1;
+        public KoreanCalendar();
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetWeekOfYear(DateTime time, CalendarWeekRule rule, DayOfWeek firstDayOfWeek);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public class KoreanLunisolarCalendar : EastAsianLunisolarCalendar {
+        public const int GregorianEra = 1;
+        public KoreanLunisolarCalendar();
+        protected override int DaysInYearBeforeMinSupportedYear { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int GetEra(DateTime time);
+    }
+    public sealed class NumberFormatInfo : IFormatProvider {
+        public NumberFormatInfo();
+        public int CurrencyDecimalDigits { get; set; }
+        public string CurrencyDecimalSeparator { get; set; }
+        public string CurrencyGroupSeparator { get; set; }
+        public int[] CurrencyGroupSizes { get; set; }
+        public int CurrencyNegativePattern { get; set; }
+        public int CurrencyPositivePattern { get; set; }
+        public string CurrencySymbol { get; set; }
+        public static NumberFormatInfo CurrentInfo { get; }
+        public static NumberFormatInfo InvariantInfo { get; }
+        public bool IsReadOnly { get; }
+        public string NaNSymbol { get; set; }
+        public string NegativeInfinitySymbol { get; set; }
+        public string NegativeSign { get; set; }
+        public int NumberDecimalDigits { get; set; }
+        public string NumberDecimalSeparator { get; set; }
+        public string NumberGroupSeparator { get; set; }
+        public int[] NumberGroupSizes { get; set; }
+        public int NumberNegativePattern { get; set; }
+        public int PercentDecimalDigits { get; set; }
+        public string PercentDecimalSeparator { get; set; }
+        public string PercentGroupSeparator { get; set; }
+        public int[] PercentGroupSizes { get; set; }
+        public int PercentNegativePattern { get; set; }
+        public int PercentPositivePattern { get; set; }
+        public string PercentSymbol { get; set; }
+        public string PerMilleSymbol { get; set; }
+        public string PositiveInfinitySymbol { get; set; }
+        public string PositiveSign { get; set; }
+        public object Clone();
+        public object GetFormat(Type formatType);
+        public static NumberFormatInfo GetInstance(IFormatProvider formatProvider);
+        public static NumberFormatInfo ReadOnly(NumberFormatInfo nfi);
+    }
+    public enum NumberStyles {
+        AllowCurrencySymbol = 256,
+        AllowDecimalPoint = 32,
+        AllowExponent = 128,
+        AllowHexSpecifier = 512,
+        AllowLeadingSign = 4,
+        AllowLeadingWhite = 1,
+        AllowParentheses = 16,
+        AllowThousands = 64,
+        AllowTrailingSign = 8,
+        AllowTrailingWhite = 2,
+        Any = 511,
+        Currency = 383,
+        Float = 167,
+        HexNumber = 515,
+        Integer = 7,
+        None = 0,
+        Number = 111,
+    }
+    public class PersianCalendar : Calendar {
+        public static readonly int PersianEra;
+        public PersianCalendar();
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public class RegionInfo {
+        public RegionInfo(string name);
+        public virtual string CurrencySymbol { get; }
+        public static RegionInfo CurrentRegion { get; }
+        public virtual string DisplayName { get; }
+        public virtual string EnglishName { get; }
+        public virtual bool IsMetric { get; }
+        public virtual string ISOCurrencySymbol { get; }
+        public virtual string Name { get; }
+        public virtual string NativeName { get; }
+        public virtual string TwoLetterISORegionName { get; }
+        public override bool Equals(object value);
+        public override int GetHashCode();
+        public override string ToString();
+    }
+    public class StringInfo {
+        public StringInfo();
+        public StringInfo(string value);
+        public int LengthInTextElements { get; }
+        public string String { get; set; }
+        public override bool Equals(object value);
+        public override int GetHashCode();
+        public static string GetNextTextElement(string str);
+        public static string GetNextTextElement(string str, int index);
+        public static TextElementEnumerator GetTextElementEnumerator(string str);
+        public static TextElementEnumerator GetTextElementEnumerator(string str, int index);
+        public static int[] ParseCombiningCharacters(string str);
+    }
+    public class TaiwanCalendar : Calendar {
+        public TaiwanCalendar();
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetWeekOfYear(DateTime time, CalendarWeekRule rule, DayOfWeek firstDayOfWeek);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public class TaiwanLunisolarCalendar : EastAsianLunisolarCalendar {
+        public TaiwanLunisolarCalendar();
+        protected override int DaysInYearBeforeMinSupportedYear { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int GetEra(DateTime time);
+    }
+    public class TextElementEnumerator : IEnumerator {
+        public object Current { get; }
+        public int ElementIndex { get; }
+        public string GetTextElement();
+        public bool MoveNext();
+        public void Reset();
+    }
+    public class TextInfo {
+        public string CultureName { get; }
+        public bool IsReadOnly { get; }
+        public bool IsRightToLeft { get; }
+        public virtual string ListSeparator { get; set; }
+        public override bool Equals(object obj);
+        public override int GetHashCode();
+        public virtual char ToLower(char c);
+        public virtual string ToLower(string str);
+        public override string ToString();
+        public virtual char ToUpper(char c);
+        public virtual string ToUpper(string str);
+    }
+    public class ThaiBuddhistCalendar : Calendar {
+        public const int ThaiBuddhistEra = 1;
+        public ThaiBuddhistCalendar();
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetWeekOfYear(DateTime time, CalendarWeekRule rule, DayOfWeek firstDayOfWeek);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public enum TimeSpanStyles {
+        AssumeNegative = 1,
+        None = 0,
+    }
+    public class UmAlQuraCalendar : Calendar {
+        public UmAlQuraCalendar();
+        public override CalendarAlgorithmType AlgorithmType { get; }
+        protected override int DaysInYearBeforeMinSupportedYear { get; }
+        public override int[] Eras { get; }
+        public override DateTime MaxSupportedDateTime { get; }
+        public override DateTime MinSupportedDateTime { get; }
+        public override int TwoDigitYearMax { get; set; }
+        public override DateTime AddMonths(DateTime time, int months);
+        public override DateTime AddYears(DateTime time, int years);
+        public override int GetDayOfMonth(DateTime time);
+        public override DayOfWeek GetDayOfWeek(DateTime time);
+        public override int GetDayOfYear(DateTime time);
+        public override int GetDaysInMonth(int year, int month, int era);
+        public override int GetDaysInYear(int year, int era);
+        public override int GetEra(DateTime time);
+        public override int GetLeapMonth(int year, int era);
+        public override int GetMonth(DateTime time);
+        public override int GetMonthsInYear(int year, int era);
+        public override int GetYear(DateTime time);
+        public override bool IsLeapDay(int year, int month, int day, int era);
+        public override bool IsLeapMonth(int year, int month, int era);
+        public override bool IsLeapYear(int year, int era);
+        public override DateTime ToDateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int era);
+        public override int ToFourDigitYear(int year);
+    }
+    public enum UnicodeCategory {
+        ClosePunctuation = 21,
+        ConnectorPunctuation = 18,
+        Control = 14,
+        CurrencySymbol = 26,
+        DashPunctuation = 19,
+        DecimalDigitNumber = 8,
+        EnclosingMark = 7,
+        FinalQuotePunctuation = 23,
+        Format = 15,
+        InitialQuotePunctuation = 22,
+        LetterNumber = 9,
+        LineSeparator = 12,
+        LowercaseLetter = 1,
+        MathSymbol = 25,
+        ModifierLetter = 3,
+        ModifierSymbol = 27,
+        NonSpacingMark = 5,
+        OpenPunctuation = 20,
+        OtherLetter = 4,
+        OtherNotAssigned = 29,
+        OtherNumber = 10,
+        OtherPunctuation = 24,
+        OtherSymbol = 28,
+        ParagraphSeparator = 13,
+        PrivateUse = 17,
+        SpaceSeparator = 11,
+        SpacingCombiningMark = 6,
+        Surrogate = 16,
+        TitlecaseLetter = 2,
+        UppercaseLetter = 0,
+    }
+}
```