using System;

public class Program

{

    public static void Main()

    {

        string first_user = "Ben";

        double first_balance = 19.54;

        string second_user = "Joel";

        double second_balance = 20.65;

        string third_user = "Gizmo";

        double third_balance = 98.44;

        Console.WriteLine("Welcome to the Big Bank of Bankery!");

        Console.WriteLine("Please input your username:");

        string input;

        input = Console.ReadLine();

        if(input.ToLower() == first_user.ToLower())

        {

            Console.WriteLine("Would you like to make a deposit?");

            string confirm_deposit = Console.ReadLine();

            if(confirm_deposit == "yes")

            {

                Console.WriteLine("How much would you like to deposit?");

                double deposit_amount = Double.Parse(Console.ReadLine());

                first_balance = Math.Round(first_balance + deposit_amount, 2);

                Console.WriteLine(first_balance);

            }else

            {

                Console.WriteLine("Your Balance is " + first_balance);

            }

        } 

        else if (input.ToLower() == second_user.ToLower())

        {

            Console.WriteLine("Would you like to make a deposit?");

            string confirm_deposit = Console.ReadLine();

            if(confirm_deposit ==  "yes")

            {

                Console.WriteLine("How much would you like to deposit?");

                double deposit_amount = Double.Parse(Console.ReadLine());

                second_balance = Math.Round(second_balance + deposit_amount, 2);

                Console.WriteLine("Your balance is " + second_balance);

            }else

            {

                Console.WriteLine("Your Balnce is " + second_balance);

            }

        }

        else if (input.ToLower() == third_user.ToLower())

        {

            Console.WriteLine("Would you like to make a deposit?");

            string confirm_deposit = Console.ReadLine();

            if(confirm_deposit == "yes")

            {

                Console.WriteLine("How much would you like to deposit?");

                double deposit_amount = Double.Parse(Console.ReadLine());

                third_balance = Math.Round(third_balance + deposit_amount, 2);

                Console.WriteLine("Your Balance is " + third_balance);

            }else

            {

                Console.WriteLine("Your Balance is " + third_balance);

            }

        }

            else

            {

            Console.WriteLine("We do not manage this account.");

        }

    }

}

​