///var b1 = new Bitmap();
///b1.bitmapData;
null
///b1.pixelSnapping;
auto
///b1.smoothing;
false
///var tbd = new TestBitmapData();
///var b2 = new Bitmap(tbd);
///b2.bitmapData;
[object TestBitmapData]
///b2.pixelSnapping;
auto
///b2.smoothing;
false
///b2.bitmapData === tbd;
true
