using System;

​

public class Program

{

    public static void Main()

    {

        try{

        string b1, b2;

        Console.WriteLine("Enter the first binary number:");

        b1 = Console.ReadLine();

        Console.WriteLine("Enter the second binary number:");

        b2 = Console.ReadLine();

        int decimal1 = Convert.ToInt32(b1, 2);

        int decimal2 = Convert.ToInt32(b2, 2);

        int result = decimal1 * decimal2;

        string binaryResult = Convert.ToString(result, 2);

        Console.WriteLine("Result in binary: " + binaryResult);

        }

        catch (FormatException)

        {

            Console.WriteLine("Invalid input. Please enter a valid binary number.");

        }

    }

}

​