static void Main(string[] args) { Console.WriteLine("Please enter number to execute task!"); int taskNumber = Convert.ToInt32(Console.ReadLine()); switch (taskNumber) { case 1: Task1.PrintGreetings(); Task1.PrintGreetings(); Task1.PrintGreetings(); break; case 2: Console.WriteLine("Please enter your Name: "); string name = Console.ReadLine(); Console.WriteLine("Please enter your Last Name: "); string sureName = Console.ReadLine(); Console.WriteLine("Hello Mr/ Mrs: "); Task2.PrintMyName(name, sureName); break; case 3: Task3.PrintNameSureName(); break; case 4: Console.WriteLine("Please write your input Number"); int number = Convert.ToInt32(Console.ReadLine()); Console.WriteLine($"Factorial number from {number} is {Task5.Factorial(number)}"); break; default: Console.WriteLine("Looks like number is out of task numbers range!"); break; } }