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.
                        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