Get country code from country full name

You can check the below links.

• https://github.com/michaelwittig/node-i18n-iso-countries
• https://github.com/richorama/country-code-lookup

If you want coutry code based on country name try below code.

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
					
public class Program
{
	public static void Main()
	{

      var regions = CultureInfo.GetCultures(CultureTypes.SpecificCultures).Select(x => new RegionInfo(x.LCID));
      var englishRegion = regions.FirstOrDefault(region => region.EnglishName.Contains("United Kingdom"));
      var countryAbbrev = englishRegion.TwoLetterISORegionName;   
   Console.WriteLine(countryAbbrev) ;

	}
} 

Try below code. It prints list of coutry with code.

using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
					
public class Program
{
	public static void Main()
	{
CultureInfo[] cultures = CultureInfo.GetCultures(CultureTypes.SpecificCultures);
        List countries = new List();
        foreach (CultureInfo ci in cultures)
        {
        RegionInfo regionInfo = new RegionInfo(ci.Name);
        if (countries.Count(x => x.EnglishName == regionInfo.EnglishName) <= 0)
            countries.Add(regionInfo);
        }
        foreach (RegionInfo regionInfo in countries.OrderBy(x => x.EnglishName))
        Console.WriteLine(regionInfo.EnglishName + "  -  " + regionInfo.TwoLetterISORegionName);

	}
}