vb.net - Nested class & readonly properties -

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outside class i'd able access cctv.camera.brightness property readonly, methods within cctv class should able modify brightness property. please can advise on how achieve this?

i think need add interface exposes properties , hides others, i'm not sure of implementation. [note constructor , main sub contrived example , testing].

public class cctv     public class camera        public property name string        public property brightness integer    end class     dim cameras new dictionary(of string, camera)    public sub new()       dim cam new camera       cam.name = "driveway"       cam.brightness = 5       cameras.add(cam.name, cam)    end sub     public sub changebrightness(value integer)       cameras("driveway").brightness = value    end sub  end class  sub main()   dim mycctv = new cctv   mycctv.changebrightness(10)   if mycctv("driveway").brightness = 10 console.write("brightness 10") end sub

get getter , setter of property can have different accessibility modifiers. in case want brightness readable code trust should able write it. this:

public class camera     private _brightness integer      public property brightness integer                     return _brightness         end         friend set(value integer)             _brightness = value         end set     end property      '' etc... end class

note added friend keyword, limits access code in same project camera class part of. can private or protected if want limit access code inside camera class or derived classes.


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