'Declaration
 
Public MustOverride Property Visible As Boolean

'Usage
 
Dim instance As ImGearARTMark
Dim value As Boolean
 
instance.Visible = value
 
value = instance.Visible

public abstract bool Visible {get; set;}

public: __property abstract bool get_Visible();
public: __property abstract void set_Visible( 
   bool value
);

public:
abstract property bool Visible {
   bool get();
   void set (    bool value);
}