public class MultiInputGesture : InputGesture
{
    public MultiInputGesture()
    {
        Gestures = new InputGestureCollection();
    }

    public InputGestureCollection Gestures { get; private set; }

    private int _currentMatchIndex = 0;

    public override bool Matches(object targetElement, InputEventArgs inputEventArgs)
    {
        if (_currentMatchIndex < Gestures.Count)
        {
            if (Gestures[_currentMatchIndex].Matches(targetElement, inputEventArgs))
            {
                _currentMatchIndex++;
                return (_currentMatchIndex == Gestures.Count);
            }
        }
        _currentMatchIndex = 0;
        return false;
    }
}