Password Encryption and Decryption

protected void encrypt_Click(object sender, EventArgs e)
{
string enc = Encrypt(TextBox2.Text);
TextBox2.Text = enc;
}

public string Encrypt(string TextToBeEncrypted)
{
RijndaelManaged RijndaelCipher = new RijndaelManaged();
String Password = "CSC";
Byte[] PlainText = System.Text.Encoding.Unicode.GetBytes(TextToBeEncrypted);
Byte[] Salt = System.Text.Encoding.ASCII.GetBytes(Password.Length.ToString());
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Password, Salt);
ICryptoTransform Encryptor = RijndaelCipher.CreateEncryptor(SecretKey.GetBytes(32), SecretKey.GetBytes(16));
MemoryStream memoryStream = new MemoryStream();
CryptoStream cryptoStream = new CryptoStream(memoryStream, Encryptor, CryptoStreamMode.Write);
cryptoStream.Write(PlainText, 0, PlainText.Length);
cryptoStream.FlushFinalBlock();
Byte[] CipherBytes = memoryStream.ToArray();
memoryStream.Close();
cryptoStream.Close();
string EncryptedData = Convert.ToBase64String(CipherBytes);
return EncryptedData;
}


public string Decrypt(string TextToBeDecrypted)
{
RijndaelManaged RijndaelCipher = new RijndaelManaged();
String Password = "CSC";
String DecryptedData;
try
{
Byte[] EncryptedData = Convert.FromBase64String(TextToBeDecrypted);
Byte[] Salt = System.Text.Encoding.ASCII.GetBytes(Password.Length.ToString());
PasswordDeriveBytes SecretKey = new PasswordDeriveBytes(Password, Salt);
ICryptoTransform Decryptor = RijndaelCipher.CreateDecryptor(SecretKey.GetBytes(32), SecretKey.GetBytes(16));
MemoryStream memoryStream = new MemoryStream(EncryptedData);
CryptoStream cryptoStream = new CryptoStream(memoryStream, Decryptor, CryptoStreamMode.Read);
Byte[] PlainText = new Byte[EncryptedData.Length - 1];
int DecryptedCount = cryptoStream.Read(PlainText, 0, PlainText.Length);
memoryStream.Close();
cryptoStream.Close();
DecryptedData = System.Text.Encoding.Unicode.GetString(PlainText, 0, DecryptedCount);
}
catch
{
DecryptedData = TextToBeDecrypted;
}
return DecryptedData;

}

protected void dencrypt_Click(object sender, EventArgs e)
{
string den=Decrypt(TextBox1.Text);
TextBox1.Text = den;
}