using System;

using System.Collections.Generic;

public class Program

{

    public static void Main()

    {

        Console.Write("Press Enter to start your library: ");

            string line1 = Console.ReadLine();                                                       

                 int n = 1;

                 while (n > 0)

                     {

                     List<string> library = new List<string>();

                    Console.WriteLine("Type 1 to enter a book's information.");

                    Console.WriteLine("Type 2 to search the library for a book");

                    string line2 = Console.ReadLine();

                    if (line2 == "1")

                    {

​

                        Console.Write("Book title: ");

                        string t = Console.ReadLine();

                         Console.Write("Book author: ");

                        string a = Console.ReadLine();

                         Console.Write("Book category: ");

                        string c = Console.ReadLine();

                         Console.Write("Dewey Decimal number: ");

                        string d = Console.ReadLine();

                            string[]  bk = new string[] {t, a, c, d};

                            //must save each input into an array of strings

                            //add array to list of arrays                       

                        //foreach (string element in bk)

                        //{ 

                        library.AddRange(bk);

                    }

                    string line3 = Console.ReadLine();

                     if (line2 == "2")

                     {

                         Console.WriteLine("Enter a title or author of a book");

                         Console.Write("Type here: ");

                         string search = Console.ReadLine();

                         var x = library.FindAll(delegate(string s){return s == "search";});

                         Console.WriteLine(x);

​

                        //Console.WriteLine(library);

                         //string result = library.Find(item => item = search);

                         //search dictionary or list for array that includes "item" and print to screen

                         }

                     }

                    }

                    }

​