AES 加密解密 c#

private const string PASSWORD = "P1e@s3Chang3thi2";
        private const string INITVECTOR = "!n1t1@liz3Vector";

        public static string AesEncrypt(this string value)
        {
            return AesEncrypt(value, PASSWORD);
        }

        public static string AesEncrypt(this string value, string password)
        {
            using (Aes aes = Aes.Create())
            {
                var encryptor = aes.CreateEncryptor(Encoding.ASCII.GetBytes(password), Encoding.ASCII.GetBytes(INITVECTOR));

                using (MemoryStream msEncrypt = new MemoryStream())
                {
                    using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
                    {
                        using (StreamWriter swEncrypt = new StreamWriter(csEncrypt))
                        {
                            swEncrypt.Write(value);
                        }

                        return Convert.ToBase64String(msEncrypt.ToArray());
                    }
                }
            }
        }

        public static string AesDecrypt(this string value)
        {
            return AesDecrypt(value, PASSWORD);
        }

        public static string AesDecrypt(this string value, string password)
        {
            using (Aes aes = Aes.Create())
            {
                var decryptor = aes.CreateDecryptor(Encoding.ASCII.GetBytes(password), System.Text.Encoding.ASCII.GetBytes(INITVECTOR));

                using (MemoryStream msDecrypt = new MemoryStream(Convert.FromBase64String(value)))
                {
                    using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read))
                    {
                        using (StreamReader srDecrypt = new StreamReader(csDecrypt))
                        {
                            return srDecrypt.ReadToEnd();
                        }
                    }
                }
            }
        }