ATM Simulator v1.1

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace atm_program
{
    public class Program
    {
        static void Main(string[] args)
        {
            string screen;
            int menupick = -1;
            Account myAccount = null;

            while (myAccount == null)
            {
                Console.WriteLine("Welcome to Regions Bank");
                Console.WriteLine("Please Select an Account");
                Console.WriteLine("1. Checking");
                Console.WriteLine("2. Savings");
                screen = Console.ReadLine();
                if(int.TryParse(screen, out menupick))
                {
                    if (menupick == 1)
                        myAccount = new Checking(8527419630);
                    else if (menupick == 2)
                        myAccount = new Savings(852741520);
                    else
                        Console.WriteLine("Error: Invalid Operation");

                }
                else
                {
                    Console.WriteLine("You must select an operation to proceed.");
                }
            }

            while (menupick != 0)
            {
                Console.WriteLine();
                Console.WriteLine("1. Account Status");
                Console.WriteLine("2. Make Deposit");
                Console.WriteLine("3. Make Withdrawal");
                Console.WriteLine("0. Quit");
                Console.WriteLine();
                Console.Write("Enter Command: ");
                screen = Console.ReadLine();
                if (int.TryParse(screen, out menupick))
                {
                    switch (menupick)
                    {
                        case 0:
                            Console.WriteLine("Thank you for choosing the Bank. Goodbye!");
                            break;
                        case 1:
                            ShowStatus(myAccount);
                            break;
                        case 2:
                            MakeDeposit(myAccount);
                            break;
                        case 3:
                            MakeWithdrawal(myAccount);
                            break;

                        default:
                            Console.WriteLine("Invalid Command!");
                            menupick = -1;
                            break;
                    }
                }
                else
                {
                    Console.WriteLine("Invalid Command!");
                    menupick = -1;
                }
            }

            Pause();
        }

        static void ShowStatus(Account account)
        {
            Console.WriteLine("------- Account Status -------");
            Console.WriteLine("  Account Number: {0}", account.AcctNo);
            Console.WriteLine("   Total Balance: {0}", account.Balance);
            Console.WriteLine("--------------------------------");
        }

        static void MakeDeposit(Account account)
        {
            string screen;
            double amount;

            Console.Write("Enter an amount you would like to deposit (must be a positive number):");
            screen = Console.ReadLine();
            if (double.TryParse(screen, out amount))
            {
               Account.Deposit(amount);
               Console.WriteLine("New Balance" + Account.Balance);

            }
            else
            {
                Console.WriteLine("Error: invalid number. Please try again.");
            }
        }

        private static void MakeWithdrawal(Account account)
        {
            string screen;
            double amount;
            Console.Write("Enter an amount you would like to withdraw");

            screen = Console.ReadLine();
            if (double.TryParse(screen, out amount))
            {
               Account.Withdrawal(amount);
               Console.WriteLine("New Balance" + Account.Balance);
            }
            else
            {
                Console.WriteLine("Error: invalid number. Please try again.");
            }


        }

        static void Pause()
        {
            Console.WriteLine();
            Console.Write("Press any key to continue... ");
            Console.ReadKey();
            Console.WriteLine("\r                               \r");
        }
    }
}