All regions and all timezones

Getting a list of all regions.

using System.Globalization;

                    

var cultures = new Dictionary<string, string>();

foreach (CultureInfo cultureInfo in CultureInfo.GetCultures(CultureTypes.SpecificCultures))

{

       var currRegion = new RegionInfo(cultureInfo.Name);

       if (!cultures.ContainsKey(currRegion.EnglishName))

       {

              cultures.Add(currRegion.EnglishName, currRegion.Name);

       }

}

Getting a list of all timezones.

using System.Collections.ObjectModel;

ReadOnlyCollection<TimeZoneInfo> timeZones = TimeZoneInfo.GetSystemTimeZones();