program.cs

using System;
using CSharpLibrary;

namespace CSharpConsole
{
    class Program
    {
        static void Main(string[] args)
        {
            LibraryProject();
        }

        public static void LibraryProject()
        {
            int row = 0;

            do
            {
                if (row == 0 || row >= 25)
                    ResetConsole();

                string input = Console.ReadLine();
                if (String.IsNullOrEmpty(input)) break;
                Console.WriteLine($"Input: {input} {"Greater than 5? ",30}: " +
                                  $"{(input.NumberGreaterThan5() ? "Yes" : "No")}\n");

                row += 3;
            } while (true);
            return;

            void ResetConsole()
            {
                if (row > 0)
                {
                    Console.WriteLine("Press any key to continue...");
                    Console.ReadKey();
                }
                Console.Clear();
                Console.WriteLine("\nPress <Enter> only to exit; otherwise, enter a string and press <Enter>:\n");
                row = 3;
            }
        }
    }
}