Public Function CanExecute( _
   ByVal parameter As T _
) As Boolean

Dim instance As DelegateCommand(Of T)
Dim parameter As T
Dim value As Boolean
 
value = instance.CanExecute(parameter)

public bool CanExecute( 
   T parameter
)

public function CanExecute( 
    parameter: T
): Boolean; 

public function CanExecute( 
   parameter : T
) : boolean;

public: bool CanExecute( 
   T* parameter
) 

public:
bool CanExecute( 
   T^ parameter
)