namespace System
{
    public readonly struct DateTime : IComparable, IComparable<DateTime>, IConvertible, IEquatable<DateTime>, IFormattable, IParsable<DateTime>, ISpanFormattable, ISpanParsable<DateTime>, ISerializable
    {
        public DateTime(int year, int month, int day, int hour, int minute, int second, int millisecond, int microsecond, Calendar! calendar);
    }
}