Example of an OnGesture handler - handling left and right swipes as served up by the TouchGestures component.

Control-OnGesture.cs

void OnGesture (Gesture gesture)
{
	switch (gesture.type)
	{
		case GestureType.Swipe:
			if (Vector2.Dot (gesture.direction, new Vector2 (1.0f, 0.0f)) > 0.8f)
			{
				Previous ();
			}
			else if (Vector2.Dot (gesture.direction, new Vector2 (-1.0f, 0.0f)) > 0.8f)
			{
				Next ();
			}
		break;
	}
}