using System;

public class Program

{

    public static void Main()

    {

        string dateXml  = "2019-11-18T00:00:00.000+01:00";

        DateTimeOffset dtoParsed = DateTimeOffset.Parse(dateXml);

        TimeZoneInfo gmtZone = TimeZoneInfo.FindSystemTimeZoneById("GMT Standard Time");

        var ukDate = TimeZoneInfo.ConvertTime(dtoParsed.LocalDateTime, TimeZoneInfo.Local, gmtZone);

        Console.WriteLine("Originally parsed DateTimeOffset as is");

        Console.WriteLine(dtoParsed);

        Console.WriteLine("Local time is");

        Console.WriteLine(dtoParsed.LocalDateTime);

​

        Console.WriteLine("UTC Time is");

        Console.WriteLine(dtoParsed.UtcDateTime);

        Console.WriteLine("Value Captured with UTC Offset:");

        Console.WriteLine(dtoParsed.Offset);        

        Console.WriteLine("UK Time is");

        Console.WriteLine(ukDate);

        Console.WriteLine("Both represent same point in time so the difference should be 0");

        Console.WriteLine(dtoParsed.Subtract(dtoParsed.LocalDateTime));

    }

}