'宣言 Public ReadOnly Default Property Item( _ ByVal rowIndex As Integer, _ ByVal cellIndex As Integer _ ) As GroupCell
'宣言
Public ReadOnly Default Property Item( _ ByVal rowIndex As Integer, _ ByVal cellIndex As Integer _ ) As GroupCell
public GroupCell this[ int rowIndex, int cellIndex ]; {get;}
GroupArea クラス GroupArea メンバ