public Bird(Form form, Pig pig) : base(form)
 {
     this.form = form;
     this.pig  = pig;
     diameter  = 50;
     Width     = diameter;
     Height    = diameter;
     Image     = Resources.bird;
     X         = diameter;
     Y         = form.ClientSize.Height - 2 * diameter;
     Top       = Y;
     Left      = X;
 }
 private void AddPig()
 {
     pig = new Pig(this, timerNextRound);
     pig.Draw();
     pig.BringToFront();
 }