using System;

using System.Collections.Generic;

using System.Linq;

using System.Runtime.InteropServices;

​

public class Program

{

    public static void Main(string[]args)

    {

        var list = new List<string> { "Côte D'Ivoire (Ivory Coast)".ToUpper() };

        var ivory = list.Single(x => x == "CÔTE D'IVOIRE (IVORY COAST)");

        Console.WriteLine(ivory ?? "Not found");

        Console.WriteLine($"{RuntimeInformation.OSDescription}");

    }

}