using System;

 public class Person

{

   public string personName;

    public string personFamily;

    public long personTelephone;

    public string personAddress;

    public int personRegYear;

​

    public Person(string first_name, string family, long telephone, string address, int regYear)

    {

        personName = first_name;

        personFamily = family;

        personTelephone = telephone;

        personAddress = address;

        personRegYear = regYear;

    }

}

​

public class FinalProject

{

public static void Main()

{

int registeredPerson = 0;

​

 Person[] personArray = new Person[200];

​

 for (int index = 0; index == 0; )

        {

  Console.Clear();

 Console.WriteLine("1. Register new person data");

 Console.WriteLine("2. Show person table by alphabet\n");

​

 Console.Write("Please Choose 1 or 2: ");

​

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

if (chosenNumber == 1)

 {

 Console.Write("Person Name: ");

 string personName = Console.ReadLine();

 Console.Write("Person Family: ");

 string personFamily = Console.ReadLine();

 Console.Write("Person Telephone: ");

long personTelephone = long.Parse(Console.ReadLine());

Console.Write("Person Address: ");

string personAddress = Console.ReadLine();

Console.Write("Person Reg Year: ");

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

​

 personArray[registeredPerson] = new Person(personName, personFamily, personTelephone, personAddress, personRegYear);

​

  registeredPerson++;

  }

​

  else if (chosenNumber == 2)

 {

 Console.Write("Please enter one character to search: ");

​

 string searchFor = Console.ReadLine();

​

  searchFor = searchFor.ToLower();

​

 searchFor = searchFor.Trim();

​

 if (searchFor == "all")

 {

 ShowTitle(); 

  int i = 0;

   while (i < registeredPerson)

 {

Person p = personArray[i];

​

 Console.WriteLine(String.Format("{0,-20} | {1,-20} | {2,-15} | {3, -30} | {4, -15}", p.personName, p.personFamily, p.personTelephone, p.personAddress, p.personRegYear));

 i++;

  }

​

 Console.WriteLine();

  }

​

  else

 {

 ShowTitle();

​

 int i = 0;

 while (i < registeredPerson)

 {

 if (personArray[i].personName[0].ToString().ToLower() == searchFor)

  {

  Person p = personArray[i];

​

  Console.WriteLine(String.Format("{0,-20} | {1,-20} | {2,-15} | {3, -30} | {4, -15}", p.personName, p.personFamily, p.personTelephone, p.personAddress, p.personRegYear));

  }

    i++;

  }

​

  Console.WriteLine();

}

​

Console.Write("Press Enter ");

​

Console.ReadLine();

            }

        }

    }

​

 static void ShowTitle()

    {

Console.WriteLine();

​

 Console.WriteLine("Name                 | Family               | Tel             | Address                        | Register Year  ");

​

 Console.WriteLine();

    }

}