System.TimeZoneInfo.ConvertTime C# (CSharp) Method

		public static DateTimeOffset ConvertTime(DateTimeOffset dateTimeOffset, TimeZoneInfo destinationTimeZone) 
		{
			if (destinationTimeZone == null) 
				throw new ArgumentNullException("destinationTimeZone");

			var utcDateTime = dateTimeOffset.UtcDateTime;

			bool isDst;
			var utcOffset =  destinationTimeZone.GetUtcOffset(utcDateTime, out isDst);

			return new DateTimeOffset(DateTime.SpecifyKind(utcDateTime, DateTimeKind.Unspecified) + utcOffset, utcOffset);
		}

 public static DateTimeOffset ToTimeZone(this DateTimeOffset date, TimeZoneInfo destinationTimeZone) => TimeZoneInfo.ConvertTime(date, destinationTimeZone);