using System;

​

public class Constants

{

    public const string Hello = "hello";

}

​

internal class Program

{

    private static readonly string _privateFieldHello = "hello";

    static void Main(string[] args)

    {

        REMOVE ME

        const string hello = "hello";

​

        var isSame = ReferenceEquals(hello, Constants.Hello);

        Console.WriteLine("1. " + isSame);

​

        isSame = ReferenceEquals(_privateFieldHello, Constants.Hello);

        Console.WriteLine("2. " + isSame);

​

​

        isSame = ReferenceEquals("hello", Constants.Hello);

        Console.WriteLine("3. " + isSame);

​

        isSame = ReferenceEquals("hello", _privateFieldHello);

        Console.WriteLine("4. " + isSame);

​

        var variable1 = new string(new[] { 'h', 'e', 'l', 'l', 'o' });

        isSame = ReferenceEquals(variable1, _privateFieldHello);

        Console.WriteLine("5. " + isSame);

​

        var variable2 = "hello";

        isSame = ReferenceEquals(variable1, variable2);

        Console.WriteLine("6. " + isSame);

​

        //what about this one?

        Console.WriteLine("7. " + (variable1 == variable2));            

    }

}