static RandomCanvas() { LeftProperty.OverrideMetadata(typeof(RandomCanvas), new FrameworkPropertyMetadata(double.NaN, OnPositioningChanged)); TopProperty.OverrideMetadata(typeof(RandomCanvas), new FrameworkPropertyMetadata(double.NaN, OnPositioningChanged)); RightProperty.OverrideMetadata(typeof(RandomCanvas), new FrameworkPropertyMetadata(double.NaN, OnPositioningChanged)); BottomProperty.OverrideMetadata(typeof(RandomCanvas), new FrameworkPropertyMetadata(double.NaN, OnPositioningChanged)); }
SetValue(TopProperty, value);