i want plane scale changes according to device screen resolution

i want someone to correct it to me
i want the plane size to scale to change if the screen resolution is like that
but it is give me error
i am trying to make the plane scale changes according to the device screen resolution
so what i miss ?

if ( Screen.SetResolution(640, 480, true))
{
planes.transform.localScale= new Vector3 (10,20,10 ) ;

}

 

You don't want to do this:

Code (CSharp):

1. if ( Screen.SetResolution(640, 480, true))

if ( Screen.SetResolution(640, 480, true))
more like

Code (CSharp):

1. if(Screen.width == 640 && Screen.height == 480 && Screen.fullScreen)
2. {
3.    //DoStuff
4. }

 

this script will affect it on editor ?
or just on android device ?
cause i am changing it now from free aspect to the size i want
nothing happen ! ?

 

?