I keep getting the "A namespace does not directly contain members such as fields or methods" error. Can someone please tell me how to fix this error?

     var Cam1 : Camera; 
 var Cam2 : Camera; 

 function Start () { 
     Cam1.enabled = true; 
     camera3rd.enabled = false; 
 } 

 function Update () { 
     if (Input.GetKeyDown ("c")){ 
         if ( Cam1.enabled == true){ 
             Cam2.enabled = true;
             Cam1.enabled = false; 
         } 
         else if (Cam2.enabled == true){
             Cam1.enabled = true; 
             Cam2.enabled = false;
             
             
         }
     }
 }