using System;

using System.Linq;

using System.Text;

public class Program

{

    public static void Main()

    {

        var x = "d83c";

        var ca = @$"\u{x}";

        Console.WriteLine(ca);

        Console.WriteLine(Char.IsHighSurrogate(ca, 0));

        Console.WriteLine(Char.IsHighSurrogate("\ud83c", 0));

    }

}