using System;

using BetterConsoleTables;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        Table  table = new Table("Time Zone Id", "Display Name", "Offset", "Offset Double");

        var timeZones = TimeZoneInfo.GetSystemTimeZones().OrderBy(tz=>tz.Id);

        foreach (var timeZone in timeZones)

        {

            TimeSpan offset = timeZone.BaseUtcOffset;

            string offsetString = $"{(offset < TimeSpan.Zero ? "-" : "+")}{offset.ToString(@"hh\:mm")}";

            double offsetHours = offset.TotalHours; // Get total offset in hours

​

            // Convert offset to decimal hours if it's not a whole hour

            if (offset.Minutes != 0)

                offsetHours = Math.Round(offset.TotalMinutes / 60.0, 1);

​

            table.AddRow(timeZone.Id, timeZone.DisplayName, offsetString, offsetHours);

        }

        Console.Write(table.ToString());

    }

}