从事件监听器访问被调用方法中的变量

Question

无论我怎么努力，我总是会收到这个可怕的“对象引用未设置为对象实例”的错误。我是C＃的新手，绝对感到困惑。任何帮助将不胜感激

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Shapes;

namespace n00bSwapper
{
    /// <summary>
    /// Interaction logic for MenuWindow.xaml
    /// </summary>
    public partial class MenuWindow : Window
    {
        long[] o { get; set; }
        byte[][] r { get; set; }
        String[] p { get; set; }
        long[] offsets = new long[0];
        byte[][] replaces = new byte[0][];
        String[] paks = new String[0];
        long[] a = new long[] { };
        byte[][] b = new byte[][] { };
        String[] c = new String[] { };
        public int count = 0;
        public static void ReplaceBytes(string pak, long offset, byte[] bytes)
        {
            BinaryWriter binaryWriter = new BinaryWriter((Stream)File.Open(pak, FileMode.Open, FileAccess.ReadWrite));
            binaryWriter.BaseStream.Seek(offset, SeekOrigin.Begin);
            binaryWriter.Write(bytes);
            binaryWriter.Close();
        }
        public MenuWindow(String type, String have, String want, long[] a, byte[][] b, String[] c)
        {
            InitializeComponent();
            HP.Source = new BitmapImage(new Uri(@"/images/" + type + "s/" + have + ".png", UriKind.Relative));
            WP.Source = new BitmapImage(new Uri(@"/images/" + type + "s/" + want + ".png", UriKind.Relative));
        }

        private void Convert(object sender, RoutedEventArgs e)
        {
            foreach (String pakFile in c)
            {
                Console.Text += pakFile + "\n";
            }
            Console.Text += "[LOG] Done!\n";
        }
    }
}

我现在的最终目标只是使Convert方法/函数中的代码起作用（idk叫它，它是按钮按下的事件监听器）可以工作-我希望它遍历每个项目并将带有该项值的行添加到控制台文本框中。