/// <summary>
        /// Method to Approve credit card
        /// </summary>
        static void ApproveCreditCard()
        {
            CreditCard cr = new CreditCard();                                      //Creating object to creditcard

            CreditcardBusinessLogicLayer cbl = new CreditcardBusinessLogicLayer(); //Creating object to Creditcard BusinessLogicLayer
            int a;

            Console.WriteLine("Enter CustomerID");
            a = int.Parse(Console.ReadLine());

            bool b = cbl.ApproveCreditCard(a);

            if (b == true)//checking the condition for approval which is called from businesslogic layer of creditcard
            {
                Console.WriteLine("You are eligible to approve credit card");
            }
            else
            {
                Console.WriteLine("You are not eligible to approve credit card");
            }
        }