String Decryption with AES

/// <summary> /// Encrypts a string /// </summary>
        ///Text to be encrypted
        ///Password to encrypt with
        ///Salt to encrypt with
        ///Can be either SHA1 or MD5
        ///Number of iterations to do
        ///Needs to be 16 ASCII characters long
        ///Can be 128, 192, or 256
        /// <returns>An encrypted string</returns>
        public static string Encrypt(string plainText, string password,
             string salt = "Kosher", string hashAlgorithm = "SHA1",
           int passwordIterations = 2, string initialVector = "OFRna73m*aze01xY",
            int keySize = 256)
        {
            if (string.IsNullOrEmpty(plainText))
                return "";

            byte[] initialVectorBytes = Encoding.ASCII.GetBytes(initialVector);
            byte[] saltValueBytes = Encoding.ASCII.GetBytes(salt);
            byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);

            PasswordDeriveBytes derivedPassword = new PasswordDeriveBytes (password, saltValueBytes, hashAlgorithm, passwordIterations);
            byte[] keyBytes = derivedPassword.GetBytes(keySize / 8);
            RijndaelManaged symmetricKey = new RijndaelManaged();
            symmetricKey.Mode = CipherMode.CBC;

            byte[] cipherTextBytes = null;

            using (ICryptoTransform encryptor = symmetricKey.CreateEncryptor(keyBytes, initialVectorBytes))
            {
                using (MemoryStream memStream = new MemoryStream())
                {
                    using (CryptoStream cryptoStream = new CryptoStream(memStream, encryptor, CryptoStreamMode.Write))
                    {
                        cryptoStream.Write(plainTextBytes, 0, plainTextBytes.Length);
                        cryptoStream.FlushFinalBlock();
                        cipherTextBytes = memStream.ToArray();
                        memStream.Close();
                        cryptoStream.Close();
                    }
                }
            }

            symmetricKey.Clear();
            return Convert.ToBase64String(cipherTextBytes);
        }

/// <summary> /// Decrypts a string /// </summary>
///Text to be decrypted
///Password to decrypt with
///Salt to decrypt with
///Can be either SHA1 or MD5
///Number of iterations to do
///Needs to be 16 ASCII characters long
///Can be 128, 192, or 256
/// <returns>A decrypted string</returns>
public static string Decrypt(string cipherText, string password,
   string salt = "Kosher", string hashAlgorithm = "SHA1",
   int passwordIterations = 2, string initialVector = "OFRna73m*aze01xY",
    int keySize = 256)
{
    if (string.IsNullOrEmpty(cipherText))
        return "";

    byte[] initialVectorBytes = Encoding.ASCII.GetBytes(initialVector);
    byte[] saltValueBytes = Encoding.ASCII.GetBytes(salt);
    byte[] cipherTextBytes = Convert.FromBase64String(cipherText);

    PasswordDeriveBytes derivedPassword = new PasswordDeriveBytes(password, saltValueBytes, hashAlgorithm, passwordIterations);
    byte[] keyBytes = derivedPassword.GetBytes(keySize / 8);

    RijndaelManaged symmetricKey = new RijndaelManaged();
    symmetricKey.Mode = CipherMode.CBC;

    byte[] plainTextBytes = new byte[cipherTextBytes.Length];
    int byteCount = 0;

    using (ICryptoTransform decryptor = symmetricKey.CreateDecryptor(keyBytes, initialVectorBytes))
    {
        using (MemoryStream memStream = new MemoryStream(cipherTextBytes))
        {
            using (CryptoStream cryptoStream = new CryptoStream(memStream, decryptor, CryptoStreamMode.Read))
            {
                byteCount = cryptoStream.Read(plainTextBytes, 0, plainTextBytes.Length);
                memStream.Close();
                cryptoStream.Close();
            }
        }
    }

    symmetricKey.Clear();
    return Encoding.UTF8.GetString(plainTextBytes, 0, byteCount);
}