using System;

public class Program

{

    public static void Main()

    {

        var hello1 = "Hello";

        var hello2 = "He" + "llo";

        var hello3 = new string(new char[] { 'H', 'e', 'l', 'l', 'o' });

        Info("hello1", hello1);

        Info("hello2", hello2);

        Info("hello3", hello3);

        Compare("hello1", hello1, "hello2", hello2);

        Compare("hello1", hello1, "hello3", hello3);

        var empty1 = "";

        var empty2 = string.Empty;

        var empty3 = new string(new char[] { });

        var empty4 = new string((char[])null);

        Info("empty1", empty1);

        Info("empty2", empty2);

        Info("empty3", empty3);

        Info("empty4", empty4);

        Compare("empty1", empty1, "empty2", empty2);

        Compare("empty1", empty1, "empty3", empty3);

        Compare("empty1", empty1, "empty4", empty4);

    }

    private static void Info(string name, string value)

    {

        Console.WriteLine(name + ", IsInterned: " + string.IsInterned(value));

    }

    private static void Compare(string name1, string value1, string name2, string value2)

    {

        Console.WriteLine(name1 + " & " +name2 + ", Equals: " + value1.Equals(value2) + ", Reference Equals: " + Object.ReferenceEquals(value1,value2));

    }

}