InitializeConnection.cs

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 PCSC;
using PCSC.Exceptions;
using PCSC.Utils;

namespace CardPersonalizationApp
{
    public partial class InitializeConnection : Form
    {
        public SCardContext? hContext;
        public SCardReader? hReader;
        public string[]? szReaders;
        public static string? selectedReader { get; set; }

        public InitializeConnection()
        {
            InitializeComponent();
        }

        private void BtnInit_Click(object sender, EventArgs e)
        {
            if (CbReader.Items.Count > 0)
            {
                return;
            }
            hContext = new SCardContext();
            hContext.Establish(SCardScope.System);

            szReaders = hContext.GetReaders();
            if (szReaders.Length <= 0)
                throw new PCSCException(
                    SCardError.NoReadersAvailable,
                    "Could not find any Smartcard reader."
                );

            CbReader.Items.AddRange(szReaders);
            CbReader.SelectedIndex = 0;
        }

        private void BtnConfirm_Click(object sender, EventArgs e)
        {
            if (CbReader.SelectedIndex == -1)
            {
                MessageBox.Show("Please select a reader");
                return;
            }

            this.Hide();
            CardPersonalizationApp form = new();
            form.Show();
            form.FormClosed += (s, args) => this.Show();
            selectedReader = CbReader.Text;
        }
    }
}