using System;

public class LogicalAnd

{

    public static void Main()

    {

        // Each method displays a message and returns a Boolean value. 

        // Method1 returns false and Method2 returns true. When & is used,

        // both methods are called. 

        Console.WriteLine("Regular AND:");

        if (Method1() & Method2())

            Console.WriteLine("Both methods returned true.");

        else

            Console.WriteLine("At least one of the methods returned false.");

​

        // When && is used, after Method1 returns false, Method2 is 

        // not called.

        Console.WriteLine("\nShort-circuit AND:");

        if (Method1() && Method2())

            Console.WriteLine("Both methods returned true.");

        else

            Console.WriteLine("At least one of the methods returned false.");

    }

​

    static bool Method1()

    {

        Console.WriteLine("Method1 called.");

        return false;

    }

​

    static bool Method2()

    {

        Console.WriteLine("Method2 called.");

        return true;

    }

}

// Output:

// Regular AND:

// Method1 called.

// Method2 called.

// At least one of the methods returned false.

​

// Short-circuit AND:

// Method1 called.

// At least one of the methods returned false.