unity3d - Set player score with playerprefs -

i need save players score display highscore , keep each time game either restarted or scene restarted. have following:

public class score : monobehaviour {  public static int score = 0; static int highscore = 0; public text text;  public static void addpoint(){     score++;     if (score > highscore) {         highscore = score;     } }  void start(){     text = getcomponent<text> ();     score = 0;     highscore = playerprefs.getint ("highscore", 0); }  void ondestroy(){     playerprefs.setint ("highscore", highscore); }  void update () {     text.text = "score: " + score + "\nhigh score: " + highscore; } } 

this causes score , highscore incremented each time hit trigger gain point. use trigger if hit object restart scene.

void oncollisionenter2d(collision2d col) {     if (col.gameobject.tag == "enemy")     {         print ("you collided!");         collided = true;         rb.gravityscale = 10;         rb.drag = 0;         invoke("startover", 1.0f);     } } 

once scene restarted both variables highscore , score being reset zero. guessing because game not saving highscore. how can save score?

add playerprefs.setint before game restarts

void oncollisionenter2d(collision2d col) {     if (col.gameobject.tag == "enemy")     {         print ("you collided!");         collided = true;         rb.gravityscale = 10;         rb.drag = 0;         playerprefs.setint ("highscore", highscore);         invoke("startover", 1.0f);     } }