请人帮我修改编译下这段C#源码

[C#] 纯文本查看 复制代码

using System;
using System.IO;
using System.Security.Cryptography;
using System.Text;

namespace ShiShiCai
{
        // Token: 0x02000004 RID: 4
        public class EncryptionHelper
        {
                // Token: 0x17000004 RID: 4
                // (get) Token: 0x0600001B RID: 27 RVA: 0x00008734 File Offset: 0x00006934
                public string Key
                {
                        get
                        {
                                return Convert.ToBase64String(EncryptionHelper.AES_KEY);
                        }
                }

                // Token: 0x0600001C RID: 28 RVA: 0x00008750 File Offset: 0x00006950
                public byte[] Encrypt(byte[] plainData)
                {
                        byte[] result;
                        using (AesCryptoServiceProvider aesCryptoServiceProvider = new AesCryptoServiceProvider())
                        {
                                using (MemoryStream memoryStream = new MemoryStream())
                                {
                                        using (CryptoStream cryptoStream = new CryptoStream(memoryStream, aesCryptoServiceProvider.CreateEncryptor(EncryptionHelper.AES_KEY, EncryptionHelper.IV), CryptoStreamMode.Write))
                                        {
                                                cryptoStream.Write(plainData, 0, plainData.Length);
                                                cryptoStream.Close();
                                                byte[] array = memoryStream.ToArray();
                                                byte[] array2 = new byte[EncryptionHelper.IV.Length + array.Length];
                                                Array.Copy(EncryptionHelper.IV, 0, array2, 0, EncryptionHelper.IV.Length);
                                                Array.Copy(array, 0, array2, EncryptionHelper.IV.Length, array.Length);
                                                result = array2;
                                        }
                                }
                        }
                        return result;
                }

                // Token: 0x0600001D RID: 29 RVA: 0x0000882C File Offset: 0x00006A2C
                public byte[] Decrypt(byte[] encryptionData)
                {
                        byte[] result;
                        using (AesCryptoServiceProvider aesCryptoServiceProvider = new AesCryptoServiceProvider())
                        {
                                using (MemoryStream memoryStream = new MemoryStream())
                                {
                                        byte[] array = new byte[16];
                                        Array.Copy(encryptionData, 0, array, 0, array.Length);
                                        using (CryptoStream cryptoStream = new CryptoStream(memoryStream, aesCryptoServiceProvider.CreateDecryptor(EncryptionHelper.AES_KEY, array), CryptoStreamMode.Write))
                                        {
                                                cryptoStream.Write(encryptionData, EncryptionHelper.IV.Length, encryptionData.Length - EncryptionHelper.IV.Length);
                                                cryptoStream.Close();
                                                result = memoryStream.ToArray();
                                        }
                                }
                        }
                        return result;
                }

                // Token: 0x0600001E RID: 30 RVA: 0x000088E8 File Offset: 0x00006AE8
                public string EncryptString(string plainString)
                {
                        byte[] bytes = Encoding.UTF8.GetBytes(plainString);
                        byte[] inArray = this.Encrypt(bytes);
                        return Convert.ToBase64String(inArray);
                }

                // Token: 0x0600001F RID: 31 RVA: 0x00008914 File Offset: 0x00006B14
                public string DecryptString(string encryptedString)
                {
                        byte[] encryptionData = Convert.FromBase64String(encryptedString);
                        byte[] bytes = this.Decrypt(encryptionData);
                        return Encoding.UTF8.GetString(bytes);
                }

                // Token: 0x04000058 RID: 88
                private static readonly byte[] IV = new byte[]
                {
                        201,
                        219,
                        55,
                        183,
                        156,
                        64,
                        85,
                        204,
                        201,
                        219,
                        55,
                        183,
                        156,
                        64,
                        85,
                        204
                };

                // Token: 0x04000059 RID: 89
                private static readonly byte[] AES_KEY = new byte[]
                {
                        201,
                        219,
                        55,
                        183,
                        156,
                        64,
                        85,
                        204,
                        201,
                        219,
                        55,
                        183,
                        156,
                        64,
                        85,
                        204
                };
        }
}

把加密那部分写出来就行了，解密那部分去掉，弄成一个注册机