public bool Equals(PointFloat p)
 {
     return MatchFields(this, p);
 }
 public RectF(float left, float right, float top, float bottom)
 {
     _topLeft = new PointFloat(left, top);
     _bottomRight = new PointFloat(right, bottom);
 }
 private static bool MatchFields(PointFloat a, PointFloat m)
 {
     return (a.X == m.X && a.Y == m.Y);
 }
 public RectF(PointFloat topLeft, PointFloat bottomRight)
 {
     _topLeft = topLeft;
     _bottomRight = bottomRight;
 }