I seem to be having an intermittent issue when setting the Fill on a rectangle or the Background on a Canvas, in the .Net code behind. Code looks something like this:
Rectangle hh = new Rectangle();
----> hh.Fill = new SolidColorBrush(Color.FromArgb(0x99, 0xbd, 0x80, 0x80));
hh.IsHitTestVisible = false;
The exception I get is an ArgumentException, message "Value does not fall within the expected range" and no inner exception, but it only happens every once in a while when running the same code. Anyone got any ideas?