Public Class PasswordKey 
   Inherits CryptoKey
   Implements IEncryptDecrypt 

public class PasswordKey : CryptoKey, IEncryptDecrypt  

byte[] bytes;
byte[] svalue = Encoding.ASCII.GetBytes("some text value");

using (PasswordKey pk = new PasswordKey(TEST_PASSWORD))
    bytes = pk.Encrypt(svalue);

using (PasswordKey pk = new PasswordKey(TEST_PASSWORD))
    bytes = pk.Decrypt(bytes);

Assert.AreEqual(svalue, bytes);

Dim bytes As Byte()
Dim svalue As Byte() = Encoding.ASCII.GetBytes("some text value")

Using pk As New PasswordKey(TEST_PASSWORD)
    bytes = pk.Encrypt(svalue)
End Using

Using pk As New PasswordKey(TEST_PASSWORD)
    bytes = pk.Decrypt(bytes)
End Using

Assert.AreEqual(svalue, bytes)