static void Main(string[] args) { int option = 0; int decide = 1; while (decide == 1) { Console.WriteLine("Enter for framework : 1 for ADO.net 2 for Entity Framework "); int choice = Convert.ToInt32(Console.ReadLine()); Console.WriteLine("Enter which operation You want to perform: 1: Add_account 2: Deposit 3.Withdrawal 4. Calculate interest remaining: 5.Display Account Details "); option = int.Parse(Console.ReadLine()); if (choice == 1) { Accounts a1 = new Accounts(); switch (option) { case 1: a1.Add_account(); break; case 2: a1.deposit(); break; case 3: a1.withdraw(); break; case 4: a1.interest(); break; case 5: Class1 c = new Class1(); c.Display(); break; } Console.WriteLine("Do you want to continue: 1: Yes 2: No"); decide = int.Parse(Console.ReadLine()); } else if (choice == 2) { Entity a1 = new Entity(); switch (option) { case 1: a1.Add_account(); break; case 2: a1.deposit(); break; case 3: a1.withdraw(); break; case 4: a1.interest(); break; case 5: a1.Display(); break; } Console.WriteLine("Do you want to continue: 1: Yes 2: No"); decide = int.Parse(Console.ReadLine()); } } Console.ReadKey(); }