using System;

using System.Text;

​

public class Program

{

    public static void Main()

    {

        string str = "London";

        StringBuilder sb = new StringBuilder("London");

        object obj = sb.ToString();

        Console.WriteLine(str == obj);

        Console.WriteLine(str == sb.ToString());

        Console.WriteLine(str.Equals(obj));

        Console.WriteLine(obj.Equals(str));

    }

}