book.StartDateTime = TimeZoneInfo.ConvertTimeToUtc(DateTime.SpecifyKind(book.StartDateTime.Value, DateTimeKind.Unspecified), ToolsHelper.OlsonTimeZoneToTimeZoneInfo(locationDetails.TimeZone)); // book.CreatedDate.Value.ToUniversalTime();

DateTimeOffset dto = new DateTimeOffset(bookli.StartDateTime.Value, TimeSpan.Zero); bookView.StartDTO = TimeZoneInfo.ConvertTime(dto, ToolsHelper.OlsonTimeZoneToTimeZoneInfo(deCompany.TimeZone)); Hope the above code works for you .!