DD.WellWorkover.Cloud/AsbCloudApp/Data/SimpleTimezoneDto.cs

using System;

namespace AsbCloudApp.Data
{
    /// <summary>
    /// временная зона
    /// </summary>
    public class SimpleTimezoneDto
    {
        /// <summary>
        /// смещение в часах относительно UTC
        /// </summary>
        public double Hours { get; set; }

        /// <summary>
        /// идентификатор часовой зоны
        /// </summary>
        public string? TimezoneId { get; set; }

        /// <summary>
        /// запрет на переопределение
        /// </summary>
        public bool IsOverride { get; set; }

        /// <summary>
        /// Смещение часового пояса
        /// </summary>
        public TimeSpan Offset => TimeSpan.FromHours(Hours);

        /// <inheritdoc/>
        public override bool Equals(object? obj)
        {
            if (obj is SimpleTimezoneDto tTimeZone
                && tTimeZone.Hours == Hours
                && tTimeZone.TimezoneId == TimezoneId
                && tTimeZone.IsOverride == IsOverride)
                return true;
            return false;
        }

        /// <inheritdoc/>
        public override int GetHashCode()
           => Hours.GetHashCode()
            | TimezoneId?.GetHashCode()??-1
            | IsOverride.GetHashCode();

        /// <inheritdoc/>
        public override string ToString()
            => $"{TimezoneId} (UTC+{Hours:00.##})";
    }
}