AES 加密解密方法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;

namespace fileEncrypt
{
    class Encrypt
    {

        /// <summary>
        /// AES加密
        /// </summary>
        /// <param name="array">要加密的 byte[] 数组</param>
        /// <param name="key"></param>
        /// <returns></returns>
        public byte[] EncryptClass(byte[] array, string key)
        {
            key = FmtPassword(key);
            byte[] keyArray = Encoding.UTF8.GetBytes(key);

        &nbs