Display highlighted data from Listbox in Textboxes

[mariocatch]

You can store any type of 'object' in an array.

        static void Main(string[] args)
        {
            const int NumContacts = 2;
            Contact[] contacts = new Contact[NumContacts];
            contacts[0] = new Contact("Mario", "Catch", "123 ASDF", "555-555-5555");
            contacts[1] = new Contact("Luigi", "IHadTo", "123 FDSA", "555-555-5556");

            foreach (Contact contact in contacts)
            {
                contact.Show();
            }

            Console.ReadLine();
        }

        public class Contact
        {
            public string FirstName { get; set; }
            public string LastName { get; set; }
            public string Address { get; set; }
            public string PhoneNumber { get; set; }

            public Contact() { }

            public Contact(string firstName, string lastName, string address, string phoneNumber)
            {
                FirstName = firstName;
                LastName = lastName;
                Address = address;
                PhoneNumber = phoneNumber;
            }

            public void Show()
            {
                Console.WriteLine(
                    "Person Information:\n-Name: {0}\n-Address: {1}\n-PhoneNumber: {2}\n\n",
                    FirstName + ' ' + LastName,
                    Address,
                    PhoneNumber);
            }
        }

This is using Contact[], which is an array of Contacts.
You can set the properties of the Contact to the values of your TextBox's instead of hardcoded strings.