To implement this attribute It is necessary to inherit a category from Exclusive base class-initializer or use a static helper technique: @Kent details out that Properties will not be required to encapsulate fields, they may do a calculation on other fields, or serve other needs. OldCurmudgeonOldCurmudgeon 66k1818 gold badges126126 silver https://builderfloorforsaleinbhiwadi.blogspot.com/