using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;using System;
using System.Collections.Generic;
using System.Windows.Forms;


namespace Chapter_5
{
    public partial class Form1 : Form
    {
        
        public Form1()
        {
            InitializeComponent();
        }
        private List<string> friendNames = new List<string>();

        private void button1_Click(object sender, EventArgs e)
        {
            string input = "";
            do
            {
                input = Microsoft.VisualBasic.Interaction.InputBox(
                    "Please enter a friend's name, then press ENTER" + Environment.NewLine + "(Enter -99 to stop input)",
                    "Input", "John Doe", 100, 100);
            
                if(input != "-99")
                {
                    friendNames.Add(input);
                }
            }
            while (input != "-99");

            ShowFriendNames();
        }

        private void ShowFriendNames()
        {
            string names = string.Join(Environment.NewLine, friendNames);
            MessageBox.Show("Here are your friends:" + Environment.NewLine + names, "Friends List", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }
    }
}