using System;
using System.Collections.ObjectModel;
public class Program
{
public static void Main() {
ReadOnlyCollection<TimeZoneInfo> zones = TimeZoneInfo.GetSystemTimeZones();
Console.WriteLine("The local system has {0} time zones \n", zones.Count);
foreach (TimeZoneInfo zone in zones)
Console.WriteLine(zone.Id);
}
}
/*
run:
The local system has 424 time zones
Pacific/Niue
Pacific/Midway
Pacific/Pago_Pago
Pacific/Tahiti
Pacific/Rarotonga
Pacific/Honolulu
America/Adak
Pacific/Marquesas
Pacific/Gambier
America/Sitka
America/Anchorage
America/Juneau
America/Nome
America/Yakutat
America/Metlakatla
Pacific/Pitcairn
America/Los_Angeles
America/Tijuana
America/Vancouver
America/Whitehorse
America/Dawson
America/Boise
America/Fort_Nelson
America/Phoenix
America/Denver
America/Mazatlan
America/Inuvik
America/Creston
America/Chihuahua
America/Ojinaga
America/Hermosillo
America/Yellowknife
America/Cambridge_Bay
America/Edmonton
America/Dawson_Creek
Pacific/Galapagos
Pacific/Easter
America/Winnipeg
America/Merida
America/Mexico_City
America/Regina
America/Resolute
America/Rankin_Inlet
America/Chicago
America/Rainy_River
America/Swift_Current
America/North_Dakota/Beulah
America/Indiana/Knox
America/Tegucigalpa
America/Guatemala
America/Managua
America/Bahia_Banderas
America/Indiana/Tell_City
America/Matamoros
America/Monterrey
America/Costa_Rica
America/El_Salvador
America/Belize
America/North_Dakota/New_Salem
America/North_Dakota/Center
America/Menominee
America/Guayaquil
America/Rio_Branco
America/Eirunepe
America/Bogota
America/Lima
America/Havana
America/Nipigon
America/Thunder_Bay
America/Iqaluit
America/Pangnirtung
America/Atikokan
America/New_York
America/Panama
America/Kentucky/Louisville
America/Cayman
America/Grand_Turk
America/Cancun
America/Detroit
America/Port-au-Prince
America/Toronto
America/Jamaica
America/Indiana/Marengo
America/Indiana/Winamac
America/Indiana/Petersburg
America/Indiana/Vevay
America/Indiana/Indianapolis
America/Indiana/Vincennes
America/Nassau
America/Kentucky/Monticello
America/La_Paz
America/Guyana
America/Caracas
America/Santiago
America/Asuncion
America/Campo_Grande
America/Porto_Velho
America/Boa_Vista
America/Manaus
America/Cuiaba
America/Guadeloupe
America/St_Lucia
America/Lower_Princes
America/Grenada
America/Thule
America/Barbados
America/Marigot
America/Aruba
America/Santo_Domingo
America/Dominica
America/Martinique
America/Montserrat
America/St_Barthelemy
America/Halifax
America/Glace_Bay
America/Moncton
America/Goose_Bay
America/Blanc-Sablon
America/St_Thomas
America/St_Kitts
America/Puerto_Rico
America/Antigua
America/Anguilla
America/St_Vincent
America/Port_of_Spain
America/Kralendijk
Atlantic/Bermuda
America/Tortola
America/Curacao
America/St_Johns
America/Argentina/San_Juan
America/Nuuk
America/Belem
America/Cayenne
Antarctica/Palmer
America/Fortaleza
Antarctica/Rothera
America/Recife
America/Argentina/Buenos_Aires
America/Araguaina
Atlantic/Stanley
America/Paramaribo
America/Montevideo
America/Maceio
America/Argentina/Salta
America/Argentina/Jujuy
America/Argentina/Cordoba
America/Miquelon
America/Santarem
America/Argentina/Rio_Gallegos
America/Argentina/San_Luis
America/Argentina/Mendoza
America/Argentina/Tucuman
America/Argentina/Ushuaia
America/Sao_Paulo
America/Bahia
America/Argentina/La_Rioja
America/Argentina/Catamarca
America/Punta_Arenas
America/Noronha
Atlantic/South_Georgia
Atlantic/Cape_Verde
America/Scoresbysund
Atlantic/Azores
Antarctica/Troll
Africa/Bamako
Europe/Isle_of_Man
Atlantic/St_Helena
Atlantic/Reykjavik
Africa/Bissau
Europe/Jersey
Africa/Accra
Africa/Dakar
Africa/Sao_Tome
Africa/Conakry
Africa/Freetown
Europe/London
Europe/Guernsey
Africa/Ouagadougou
America/Danmarkshavn
Africa/Abidjan
Africa/Banjul
Africa/Monrovia
Africa/Lome
Africa/Nouakchott
Atlantic/Canary
Atlantic/Madeira
Atlantic/Faroe
Europe/Lisbon
Africa/Casablanca
Africa/El_Aaiun
Europe/Podgorica
Europe/Warsaw
Europe/Malta
Europe/Skopje
Europe/Amsterdam
Europe/Vaduz
Europe/Monaco
Europe/Oslo
Europe/Luxembourg
Europe/Andorra
Europe/Madrid
Africa/Algiers
Europe/Rome
Africa/Ceuta
Europe/Berlin
Europe/San_Marino
Europe/Paris
Europe/Prague
Africa/Tunis
Europe/Zurich
Europe/Brussels
Europe/Copenhagen
Europe/Sarajevo
Europe/Gibraltar
Europe/Vienna
Arctic/Longyearbyen
Europe/Ljubljana
Europe/Zagreb
Europe/Budapest
Europe/Stockholm
Europe/Vatican
Europe/Tirane
Europe/Belgrade
Europe/Bratislava
Europe/Busingen
Europe/Dublin
Africa/Lagos
Africa/Luanda
Africa/Malabo
Africa/Libreville
Africa/Ndjamena
Africa/Porto-Novo
Africa/Douala
Africa/Bangui
Africa/Brazzaville
Africa/Niamey
Africa/Kinshasa
Africa/Blantyre
Africa/Windhoek
Africa/Khartoum
Africa/Maputo
Africa/Kigali
Africa/Juba
Africa/Harare
Africa/Lusaka
Africa/Bujumbura
Africa/Gaborone
Africa/Lubumbashi
Asia/Nicosia
Europe/Kaliningrad
Asia/Hebron
Europe/Sofia
Asia/Gaza
Asia/Amman
Europe/Mariehamn
Europe/Athens
Asia/Beirut
Europe/Zaporozhye
Africa/Cairo
Asia/Famagusta
Europe/Tallinn
Asia/Damascus
Europe/Vilnius
Europe/Helsinki
Europe/Bucharest
Europe/Uzhgorod
Europe/Chisinau
Africa/Tripoli
Europe/Riga
Europe/Kiev
Asia/Jerusalem
Africa/Mbabane
Africa/Johannesburg
Africa/Maseru
Asia/Baghdad
Asia/Riyadh
Europe/Kirov
Europe/Volgograd
Asia/Bahrain
Europe/Minsk
Asia/Qatar
Antarctica/Syowa
Europe/Istanbul
Asia/Kuwait
Asia/Aden
Africa/Mogadishu
Africa/Dar_es_Salaam
Africa/Kampala
Indian/Antananarivo
Indian/Comoro
Africa/Addis_Ababa
Africa/Asmara
Indian/Mayotte
Africa/Djibouti
Africa/Nairobi
Europe/Moscow
Europe/Simferopol
Asia/Tehran
Indian/Reunion
Asia/Dubai
Asia/Tbilisi
Europe/Saratov
Asia/Baku
Indian/Mauritius
Europe/Ulyanovsk
Asia/Yerevan
Europe/Samara
Indian/Mahe
Asia/Muscat
Europe/Astrakhan
Asia/Kabul
Asia/Oral
Antarctica/Mawson
Asia/Atyrau
Indian/Kerguelen
Asia/Dushanbe
Asia/Ashgabat
Indian/Maldives
Asia/Aqtau
Asia/Aqtobe
Asia/Samarkand
Asia/Yekaterinburg
Asia/Tashkent
Asia/Qyzylorda
Asia/Karachi
Asia/Colombo
Asia/Kolkata
Asia/Kathmandu
Asia/Dhaka
Asia/Almaty
Indian/Chagos
Asia/Urumqi
Asia/Omsk
Asia/Bishkek
Asia/Thimphu
Antarctica/Vostok
Asia/Qostanay
Indian/Cocos
Asia/Yangon
Indian/Christmas
Asia/Phnom_Penh
Asia/Bangkok
Asia/Novokuznetsk
Asia/Vientiane
Asia/Ho_Chi_Minh
Asia/Krasnoyarsk
Asia/Hovd
Antarctica/Davis
Asia/Novosibirsk
Asia/Barnaul
Asia/Tomsk
Asia/Jakarta
Asia/Pontianak
Asia/Irkutsk
Asia/Kuching
Asia/Brunei
Asia/Kuala_Lumpur
Asia/Ulaanbaatar
Asia/Singapore
Asia/Choibalsan
Australia/Perth
Asia/Macau
Asia/Shanghai
Asia/Taipei
Asia/Hong_Kong
Asia/Manila
Asia/Makassar
Australia/Eucla
Asia/Dili
Pacific/Palau
Asia/Chita
Asia/Yakutsk
Asia/Khandyga
Asia/Tokyo
Asia/Pyongyang
Asia/Seoul
Asia/Jayapura
Australia/Broken_Hill
Australia/Adelaide
Australia/Darwin
Antarctica/DumontDUrville
Pacific/Port_Moresby
Asia/Ust-Nera
Asia/Vladivostok
Pacific/Chuuk
Australia/Hobart
Antarctica/Macquarie
Australia/Melbourne
Australia/Sydney
Australia/Brisbane
Australia/Lindeman
Pacific/Saipan
Pacific/Guam
Australia/Lord_Howe
Pacific/Bougainville
Pacific/Norfolk
Pacific/Noumea
Pacific/Efate
Pacific/Guadalcanal
Asia/Srednekolymsk
Asia/Magadan
Pacific/Kosrae
Pacific/Pohnpei
Asia/Sakhalin
Antarctica/Casey
Pacific/Nauru
Pacific/Majuro
Pacific/Wallis
Pacific/Kwajalein
Pacific/Funafuti
Pacific/Wake
Asia/Anadyr
Pacific/Tarawa
Asia/Kamchatka
Pacific/Fiji
Pacific/Auckland
Antarctica/McMurdo
Pacific/Chatham
Pacific/Fakaofo
Pacific/Kanton
Pacific/Apia
Pacific/Tongatapu
Pacific/Kiritimati
*/
