DD.WellWorkover.Cloud/AsbCloudInfrastructure/DateTimeExtentions.cs

using System;

namespace AsbCloudInfrastructure
{
    public static class DateTimeExtentions
    {
        public static DateTimeOffset ToUtcDateTimeOffset(this DateTime date, double remoteTimezoneOffsetHours)
        {
            if (date == default)
                return new DateTimeOffset();

            var dateUtc = date.Kind switch
            {
                DateTimeKind.Local => date.ToUniversalTime(),
                DateTimeKind.Unspecified => date.AddHours(-remoteTimezoneOffsetHours),
                _ => date,
            };
            return new DateTimeOffset(dateUtc);
        }

        public static DateTime ToRemoteDateTime(this DateTimeOffset date, double remoteTimezoneOffsetHours)
        {
            if (date == default)
                return new DateTime(0, DateTimeKind.Unspecified);
            var dateTz = date.ToOffset(TimeSpan.FromHours(remoteTimezoneOffsetHours));
            return dateTz.DateTime;
        }
    }
}