static void Main(string[] args)
{
Console.WriteLine("Welcome to Phone Book Application");
Console.WriteLine("Select Operation");
Console.WriteLine("1. Add Contact");
Console.WriteLine("2. Display Contact by no");
Console.WriteLine("3. Display all contacts");
Console.WriteLine("4. Search contacts for a given name ");
Console.WriteLine("5. Press x for exit");
var userInput = Console.ReadLine();
var phoneBook = new PhoneBook();
while (true)
{
switch (userInput)
{
case "1":
Console.WriteLine("Contact Name:");
var name = Console.ReadLine();
Console.WriteLine("Contact Number:");
var number = Console.ReadLine();
var newContact = new Contact(name, number);
phoneBook.AddContact(newContact);
break;
case "2":
Console.WriteLine("Contact Number to search:");
var searchNumber = Console.ReadLine();
phoneBook.DisplayContact(searchNumber);
break;
case "3":
phoneBook.DisplayAllContact();
break;
case "4":
Console.WriteLine("Contact name to search:");
var searchName = Console.ReadLine();
phoneBook.DisplayMatchingContacts(searchName);
break;
case "x":
return;
default:
Console.WriteLine("Number Invalid");
break;
}
Console.WriteLine("Select Operation");
userInput = Console.ReadLine();
}
}