c# - unity 3d error how to fix it -

i starting project , got error can't figure out what's wrong it. appreaciate , sorry if it's stupid question. still new @ unity. answers.

i tried searching vector2(width,height) me looks fine. , if can please explain rect.center problem why did got it?

unity3d error:

assets/scenes/game/scripts/gui/gamegui.cs(22,22): error cs1061: type `unityengine.rect' not contain definition `center' , no extension method `center' of type `unityengine.rect' found (are missing using directive or assembly reference?) 

code:

using unityengine; using system.collections;  public class gamegui : monobehaviour {       void onresume() {         enabled = true;     }      void onpause() {         enabled = false;     }       void ongui() {         int fps = (int) (1f/time.deltatime*time.timescale);         guilayout.box( "fps "+fps );          vector2 size = gui.skin.label.calcsize( new guicontent("+") );         rect rect = new rect(0, 0, size.x, size.y);         rect.center = new vector2(screen.width, screen.height)/2f;         gui.label( rect, "+" );     }   } 

thank time.

the center property introduced in unity 3.5 according unity's script reference history page.. have calculate center on own. maybe constructor should this:

rect rect = new rect(screen.width/2f, screen.height/2f, size.x, size.y);