C# Lab - [21/11/12]

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace MyConApp
{
    class Program
    {
        static List<Person> PersonList = null;

        static void Main(string[] args)
        {
            PersonList = new List<Person>();

            bool Exit = false;
            while (!Exit)
            {
                string menuIndex = ShowMenu();
                Exit = ActionsMenu(menuIndex);
            }
        }

        #region Person Functions

        public static void NewPerson()
        {
            Person p = new Person();
            Console.Write("Input Name: ");
            p.FirstName = Console.ReadLine();
            Console.Write("Input Surname: ");
            p.LastName = Console.ReadLine();
            Console.Write("Input Age: ");
            p.Age = int.Parse(Console.ReadLine());
            PersonList.Add(p);
        }

        public static void SearchPerson()
        {
            Console.Write("Input Filter: ");
            string filter = Console.ReadLine();

            List<Person> FoundPersons = PersonList.FindAll(delegate(Person p)
            {
                return p.FirstName.Contains(filter) ||
                       p.LastName.Contains(filter) ||
                       p.Age.ToString().Contains(filter);
            });

            foreach (Person i in FoundPersons)
            {
                Console.WriteLine(i.ToString());
            }

        }

        public static void EditPerson()
        {
            Console.Write("Input person index: ");
            int i = int.Parse(Console.ReadLine());

            string FirstName = "";
            Console.WriteLine("FirstName: {0}", FirstName = Console.ReadLine());

            string LastName = "";
            Console.WriteLine("LastName: {0}", LastName = Console.ReadLine());

            string Age = "";
            Console.WriteLine("FirstName: {0}", Age = Console.ReadLine());

            Person p = PersonList[i];

            if (!string.IsNullOrWhiteSpace(FirstName)) p.FirstName = FirstName;
            if (!string.IsNullOrWhiteSpace(LastName)) p.LastName = LastName;
            if (!string.IsNullOrWhiteSpace(Age)) p.Age = int.Parse(Age);

            Console.Write("Person has been updated successfully!");

            Console.WriteLine(PersonList[i].ToString());
        }

        public static void DeletePerson()
        {
            Console.Write("Input index of the person you are willing to delete: ");

            int i = int.Parse(Console.ReadLine());

            PersonList.RemoveAt(i);

            Console.Write("Person at index of {0} has been successfully delted!", i);
        }

        public static void ClearListAndEverything()
        {
            PersonList.Clear();
            Console.Clear();
        }

        #endregion

        private static bool ActionsMenu(string menuIndex)
        {
            bool Exit = false;
            switch (menuIndex)
            {
                case "1": NewPerson(); break; //New Person
                case "2": SearchPerson(); break; //Search Person
                case "3": EditPerson(); break; //Edit Person
                case "4": DeletePerson(); break; //Delete Person
                case "5": ClearListAndEverything(); break; //Clear List
                case "6": Exit = true; break; //Exit
                default: Console.WriteLine("You have inputted wrong number! Please try again..."); break;
            }
            return Exit;
        }

        private static string ShowMenu()
        {
            Console.WriteLine("\"Person Creator v. 0.1\"");
            Console.WriteLine("1. New Person");
            Console.WriteLine("2. Search Person");
            Console.WriteLine("3. Edit Person");
            Console.WriteLine("4. Delete Person");
            Console.WriteLine("5. Clear List");
            Console.WriteLine("6. Exit");

            string menuIndex = Console.ReadLine();

            return menuIndex;
        }
    }

    public class Person
    {
        public string FirstName { get; set; }
        public string LastName { get; set; }
        public int Age { get; set; }

        public Person(string F = "Noname", string L = "Noname", int A = 0)
        {
            this.FirstName = F;
            this.LastName = L;
            this.Age = A;
        }

        public override string ToString()
        {
            return FirstName + "\t" + LastName + "\t" + Age.ToString();
        }
    }
}