public static void Main() { Console.ForegroundColor = ConsoleColor.Yellow; ConsoleHelper.OutputHeading("BNU CO453 Applications Programming 2020-2021!"); string[] choices = { "Distance Converter", "BMI Calculator", "Student Marks", "Social Network" }; int choiceNo = ConsoleHelper.SelectChoice(choices); switch (choiceNo) { case 1: DistanceConverter converter = new DistanceConverter(); converter.ConvertDistance(); break; case 2: BMI bmiindex = new BMI(); bmiindex.ConvertBmi(); break; case 3: StudentGrades studentGrades = new StudentGrades(); studentGrades.StudentMenu(); break; case 4: NetworkApp socialApp = new NetworkApp(); socialApp.DisplayMenu(); break; default: Console.WriteLine("Invalid Choice!"); break; } }