namespace System
{
    public readonly struct DateTime : IAdditionOperators<DateTime, TimeSpan, DateTime>, IAdditiveIdentity<DateTime, TimeSpan>, IComparable, IComparable<DateTime>, IComparisonOperators<DateTime, DateTime>, IConvertible, IEqualityOperators<DateTime, DateTime>, IEquatable<DateTime>, IFormattable, IMinMaxValue<DateTime>, IParseable<DateTime>, ISpanFormattable, ISpanParseable<DateTime>, ISubtractionOperators<DateTime, DateTime, TimeSpan>, ISubtractionOperators<DateTime, TimeSpan, DateTime>, ISerializable
    {
        public DateTime(int year, int month, int day, int hour, int minute, int second, Calendar! calendar);
    }
}