23/07/18 16:00:19.51 zVxGTRP30.net
>>871
細かいけどINotifyPropertyChangedじゃない？
SquareにINotifyPropertyChangedを実装して、
Hogeの方でこういう風に
Square square {
get { return _square; }
set {
if (_square is not null) _square.PropertyChanged -= OnSquareChanged;
this._square = value;
if (value is not null) _square.PropertyChanged += OnSquareChanged;
}
}
void OnSquareChanged(object sender, PropertyChangedArgs e) {
this.OnPropertyChanged(nameof(this.square));
}