C# XNA Is key toggled?

Question

I've got a question about toggling keys. How do You check if the key is toggled?

Here's my quick and easy code:

    public class KeyToggle
    {
        private bool isEnabled = false;
        private Keys key = Keys.None;

        public KeyToggle(Keys key)
        {
            this.key = key;
        }

        public bool IsEnabled()
        {
            if (keyboardState.IsKeyUp(key) && previousKeyboardState.IsKeyDown(key))
                isEnabled = !isEnabled;

            return isEnabled;
        }
    }

    private KeyToggle keyToggleF12 = new KeyToggle(Keys.F12);

    protected override void Update(GameTime gameTime)
    {
        if (keyToggleF12.IsEnabled())
            Method();
    }

Do You have any better idea for checking if the key is toggled?

EDIT: I didin't mean if the key is clicked (aka current up, previous down). Toggled key is like CapsLock, You press it once and it's enabled, press it once more and it's disabled. I've updated my code a little bit:

    private List<KeyToggle> keyToggleList = new List<KeyToggle>();

    protected override void Update(GameTime gameTime)
    {
        if (IsKeyToggled(Keys.F12))
            Method();
    }

    public static bool IsKeyToggled(Keys key)
    {
        if (ReferenceEquals(keyToggleList.Find(x => x.Key == key), null))
            keyToggleList.Add(new KeyToggle(key));

        return keyToggleList.Find(x => x.Key == key).IsEnabled();
    }

Answer 1

 keyboardState = Keyboard.GetState();

 if (!oldKeyBoardState.IsKeyDown(Keys.F12) && keyboardState.IsKeyDown(Keys.F12))
 {
     //Do Stuff
 }
 oldKeyBoardState = keyboardState;

Using 2 keyboard states is the best way in my mind, and I would say you are correct.

I wouldnt even use a class, I would just make a method and call it IsToggled(Keys.F12);

and check each key with that

bool IsToggled(Keys key)
{
   if (!oldKeyBoardState.IsKeyDown(key) && keyboardState.IsKeyDown(key))
      return true;
   else
      return false;
}

EDIT: As suggested, Their is a page on MSDN.

EDIT: I see you have anouther definitions of "Toggled" I suggest you make a dictionary of bools or something, and do Keys[key] =! Keys[key]; after you check if its been pressed.