To convert the datetime into any specific region in C#, we can use FindSystemTimeZoneById method by passing the respected Zone name.
Please find below the same c# code and all list of zone ids. 
 using System;

public partial class Time : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // India Standard Time
        var timeUtc = DateTime.UtcNow;
        TimeZoneInfo istZone = TimeZoneInfo.FindSystemTimeZoneById("India Standard Time");
        DateTime istTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, istZone);
        istTimeLbl.Text = istTime.ToString();

        // Eastern Standard Time
        TimeZoneInfo easternZone = TimeZoneInfo.FindSystemTimeZoneById("Eastern Standard Time");
        DateTime easternTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, easternZone);
        estTimeLbl.Text = easternTime.ToString();

        // Central Standard Time
        TimeZoneInfo cstZone = TimeZoneInfo.FindSystemTimeZoneById("Central Standard Time");
        DateTime cstTime = TimeZoneInfo.ConvertTimeFromUtc(timeUtc, cstZone);
        cstTimeLbl.Text = cstTime.ToString();

    }
}


Please find below the list of zone ids:

• Morocco Standard Time (GMT) Casablanca
• GMT Standard Time (GMT) Greenwich Mean Time : Dublin, Edinburgh, Lisbon, London
• Greenwich Standard Time (GMT) Monrovia, Reykjavik
• W. Europe Standard Time (GMT+01:00) Amsterdam, Berlin, Bern, Rome, Stockholm, Vienna
• Central Europe Standard Time (GMT+01:00) Belgrade, Bratislava, Budapest, Ljubljana, Prague
• Romance Standard Time (GMT+01:00) Brussels, Copenhagen, Madrid, Paris
• Central European Standard Time (GMT+01:00) Sarajevo, Skopje, Warsaw, Zagreb
• W. Central Africa Standard Time (GMT+01:00) West Central Africa
• Jordan Standard Time (GMT+02:00) Amman
• GTB Standard Time (GMT+02:00) Athens, Bucharest, Istanbul
• Middle East Standard Time (GMT+02:00) Beirut
• Egypt Standard Time (GMT+02:00) Cairo
• South Africa Standard Time (GMT+02:00) Harare, Pretoria
• FLE Standard Time (GMT+02:00) Helsinki, Kyiv, Riga, Sofia, Tallinn, Vilnius
• Israel Standard Time (GMT+02:00) Jerusalem
• E. Europe Standard Time (GMT+02:00) Minsk
• Namibia Standard Time (GMT+02:00) Windhoek
• Arabic Standard Time (GMT+03:00) Baghdad
• Arab Standard Time (GMT+03:00) Kuwait, Riyadh
• Russian Standard Time (GMT+03:00) Moscow, St. Petersburg, Volgograd
• E. Africa Standard Time (GMT+03:00) Nairobi
• Georgian Standard Time (GMT+03:00) Tbilisi
• Iran Standard Time (GMT+03:30) Tehran
• Arabian Standard Time (GMT+04:00) Abu Dhabi, Muscat
• Azerbaijan Standard Time (GMT+04:00) Baku
• Mauritius Standard Time (GMT+04:00) Port Louis
• Caucasus Standard Time (GMT+04:00) Yerevan
• Afghanistan Standard Time (GMT+04:30) Kabul
• Ekaterinburg Standard Time (GMT+05:00) Ekaterinburg
• Pakistan Standard Time (GMT+05:00) Islamabad, Karachi
• West Asia Standard Time (GMT+05:00) Tashkent
• India Standard Time (GMT+05:30) Chennai, Kolkata, Mumbai, New Delhi
• Sri Lanka Standard Time (GMT+05:30) Sri Jayawardenepura
• Nepal Standard Time (GMT+05:45) Kathmandu
• N. Central Asia Standard Time (GMT+06:00) Almaty, Novosibirsk
• Central Asia Standard Time (GMT+06:00) Astana, Dhaka
• Myanmar Standard Time (GMT+06:30) Yangon (Rangoon)
• SE Asia Standard Time (GMT+07:00) Bangkok, Hanoi, Jakarta
• North Asia Standard Time (GMT+07:00) Krasnoyarsk
• China Standard Time (GMT+08:00) Beijing, Chongqing, Hong Kong, Urumqi
• North Asia East Standard Time (GMT+08:00) Irkutsk, Ulaan Bataar
• Singapore Standard Time (GMT+08:00) Kuala Lumpur, Singapore
• W. Australia Standard Time (GMT+08:00) Perth
• Taipei Standard Time (GMT+08:00) Taipei
• Tokyo Standard Time (GMT+09:00) Osaka, Sapporo, Tokyo
• Korea Standard Time (GMT+09:00) Seoul
• Yakutsk Standard Time (GMT+09:00) Yakutsk
• Cen. Australia Standard Time (GMT+09:30) Adelaide
• AUS Central Standard Time (GMT+09:30) Darwin
• E. Australia Standard Time (GMT+10:00) Brisbane
• AUS Eastern Standard Time (GMT+10:00) Canberra, Melbourne, Sydney
• West Pacific Standard Time (GMT+10:00) Guam, Port Moresby
• Tasmania Standard Time (GMT+10:00) Hobart
• Vladivostok Standard Time (GMT+10:00) Vladivostok
• Central Pacific Standard Time (GMT+11:00) Magadan, Solomon Is., New Caledonia
• New Zealand Standard Time (GMT+12:00) Auckland, Wellington
• Fiji Standard Time (GMT+12:00) Fiji, Kamchatka, Marshall Is.
• Tonga Standard Time (GMT+13:00) Nuku'alofa
• Azores Standard Time (GMT-01:00) Azores
• Cape Verde Standard Time (GMT-01:00) Cape Verde Is.
• Mid-Atlantic Standard Time (GMT-02:00) Mid-Atlantic
• E. South America Standard Time (GMT-03:00) Brasilia
• Argentina Standard Time (GMT-03:00) Buenos Aires
• SA Eastern Standard Time (GMT-03:00) Georgetown
• Greenland Standard Time (GMT-03:00) Greenland
• Montevideo Standard Time (GMT-03:00) Montevideo
• Newfoundland Standard Time (GMT-03:30) Newfoundland
• Atlantic Standard Time (GMT-04:00) Atlantic Time (Canada)
• SA Western Standard Time (GMT-04:00) La Paz
• Central Brazilian Standard Time (GMT-04:00) Manaus
• Pacific SA Standard Time (GMT-04:00) Santiago
• Venezuela Standard Time (GMT-04:30) Caracas
• SA Pacific Standard Time (GMT-05:00) Bogota, Lima, Quito, Rio Branco
• Eastern Standard Time (GMT-05:00) Eastern Time (US & Canada)
• US Eastern Standard Time (GMT-05:00) Indiana (East)
• Central America Standard Time (GMT-06:00) Central America
• Central Standard Time (GMT-06:00) Central Time (US & Canada)
• Central Standard Time (Mexico) (GMT-06:00) Guadalajara, Mexico City, Monterrey
• Canada Central Standard Time (GMT-06:00) Saskatchewan
• US Mountain Standard Time (GMT-07:00) Arizona
• Mountain Standard Time (Mexico) (GMT-07:00) Chihuahua, La Paz, Mazatlan
• Mountain Standard Time (GMT-07:00) Mountain Time (US & Canada)
• Pacific Standard Time (GMT-08:00) Pacific Time (US & Canada)
• Pacific Standard Time (Mexico) (GMT-08:00) Tijuana, Baja California
• Alaskan Standard Time (GMT-09:00) Alaska
• Hawaiian Standard Time (GMT-10:00) Hawaii
• Samoa Standard Time (GMT-11:00) Midway Island, Samoa
• Dateline Standard Time (GMT-12:00) International Date Line West