Public Overloads Function IsNull( _
   ByVal columnName As String _
) As Boolean

Dim instance As ObjectRow
Dim columnName As String
Dim value As Boolean
 
value = instance.IsNull(columnName)

public bool IsNull( 
   string columnName
)

public function IsNull( 
    columnName: String
): Boolean; 

public function IsNull( 
   columnName : String
) : boolean;

public: bool IsNull( 
   string* columnName
) 

public:
bool IsNull( 
   String^ columnName
)