CUSTOMER
namespace Exercise
{
    public class Customer
    {
        private String firstName;
        private String lastName;

        public void setName(String firstName, String lastName)
        {
            this.firstName = firstName; //corresponds to the first class
            this.lastName = lastName;
        }
        public String getName()
        {

        }
        public void printName()
        {
            Console.WriteLine(lastName + "," + firstName);
            //Console.ReadKey();
        }

    }
}

MAIN METHOD
namespace Exercise
{
    class Program
    {
        static void Main(string[] args)
        {
            Customer customer1 = new Customer();
            customer1.setName("Solid,", "Snake");

            BankAccount b = new BankAccount();
            b.setCustomer(customer1);
            b.setBalance(2000);
            Console.WriteLine("Customer" + b.getCustomer().getName() + " has a balance of " + b.getBalance();
        }
    }
}

BANK ACCOUNT
namespace Exercise
{
    public class BankAccount
    {
        private float balance = 0;
        private Customer customer = 0;

        public void setBalance(float balance)
        {
            this.balance = balance;
        }

    }
}