static void Main(string[] args) { Console.WriteLine("Welcome to the guitar app!"); var lib = new Lib(); while (true) { Console.Write("What style of guitar do you want to see? "); string style = Console.ReadLine(); if (string.IsNullOrWhiteSpace(style)) { Console.WriteLine("Bye!"); break; } Guitar[] guitars = lib.AllGuitars(style); Console.WriteLine($"We found {guitars.Length} guitars of type {style}"); int idx = 0; foreach (var g in guitars) { idx++; Console.WriteLine($"{idx}. {g.Name} for ${g.Price} ({g.Style})"); } } }