static void Main(string[] args) { string command; do { Console.Clear(); ConsoleEx.WriteLine("Choose desired option:", ConsoleColor.Blue); ConsoleEx.WriteLine("1. Medicines", ConsoleColor.Blue); ConsoleEx.WriteLine("2. Prescriptions", ConsoleColor.Blue); ConsoleEx.WriteLine("3. Orders", ConsoleColor.Blue); ConsoleEx.WriteLine("4. Exit", ConsoleColor.Blue); command = Console.ReadLine(); if (command == "med" || command == "1") { Console.Clear(); Medicine.Choice(); } if (command == "pres" || command == "2") { Console.Clear(); Prescription.Choice(); } if (command == "order" || command == "3") { Console.Clear(); Order.Choice(); } } while (command != "exit" && command != "4"); }