using System;

using System.Collections.Generic;

​

public class Program

{

    public static void Main()

    {

        Console.WriteLine(string.Compare("A꙰B", "AB"));

        Console.WriteLine(string.Equals("A꙰B", "AB", StringComparison.InvariantCulture));

        Console.WriteLine(string.Compare("A•B", "AB"));

        Console.WriteLine(string.Compare("A•B", "AB", StringComparison.InvariantCulture));

        Console.WriteLine("A꙰B".GetHashCode());

        Console.WriteLine("A•B".GetHashCode());

        Console.WriteLine("AB".GetHashCode());

        var s = new SortedList<string, bool>();

        s.Add("A꙰B", true);

        Console.WriteLine("Get 'AB': "+ s.GetValueOrDefault("AB"));

        Console.WriteLine("Get 'A꙰B': "+ s.GetValueOrDefault("A꙰B"));

        Console.WriteLine(s.Keys[0]);

        s.Add("AB", true);

    }

}