public void DelFirstFingerDragMethod(FirstFingerDragMethod dragMethod)
{
firstFingerDragMethods -= dragMethod;
if (firstFingerDragMethods == null)
{
dragRecognizer.enabled = false;
}
}
public void AddFirstFingerDragMethod(FirstFingerDragMethod dragMethod)
{
CheckEnable(dragRecognizer);
firstFingerDragMethods += dragMethod;
}