unity 暂停Animation时，恢复到开始位置

public class ClickDoor : MonoBehaviour
{
    public Animation _animation;
    private bool state = false;
    private AnimationState animationState; 
    private void Start()
    {
        _animation = GetComponent<Animation>();
        foreach (AnimationState state in _animation)
        {
            animationState = state;
        }
    }

    public void PlayDoorAnimation()
    {
        if (!state)
        {
            _animation.Play();
        }
        else
        {
            animationState.time = 0;
            _animation.Sample();
            _animation.Stop();
        }
        state = !state;
    }

    void OnMouseDown()
    {
        PlayDoorAnimation();
    }
}