namespace System
{
    public readonly struct DateTimeOffset : IAdditionOperators<DateTimeOffset, TimeSpan, DateTimeOffset>, IAdditiveIdentity<DateTimeOffset, TimeSpan>, IComparable, IComparable<DateTimeOffset>, IComparisonOperators<DateTimeOffset, DateTimeOffset>, IEqualityOperators<DateTimeOffset, DateTimeOffset>, IEquatable<DateTimeOffset>, IFormattable, IMinMaxValue<DateTimeOffset>, IParseable<DateTimeOffset>, ISpanFormattable, ISpanParseable<DateTimeOffset>, ISubtractionOperators<DateTimeOffset, DateTimeOffset, TimeSpan>, ISubtractionOperators<DateTimeOffset, TimeSpan, DateTimeOffset>, IDeserializationCallback, ISerializable
    {
        public static DateTimeOffset operator +(DateTimeOffset dateTimeOffset, TimeSpan timeSpan);
    }
}