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public class PhysicalObject
{ 
    private double rho;
    private Point location;

    public double Rho
    {
        get { return rho;}
        set { weigth = value; }
    }
    
    public Point Location
    {
        get { return location;}
        set { location = value; }
    }

    public PhysicalObject(double rho)
    {

        this.rho = rho;
        this.locatation = new Point();
    }
    
}					

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public class Kugel : PhysicalObject
{
   private double radius;
   private Bitmap shape;

   public double Radius
   {
      get{ return radius;}
      set{ 
           radius = value;
           shape = new Bitmap(2*radius, 2*radius);
           using(Graphics g = Graphics.FromImage(shape))
           { 
       gDrawEllipse(new Pen(Color.Blue),radius, radius, radius, radius);
           }
  }
   }

   public double Volumen
   {
      get{ return 4d/3d * radius * Math.Pi;}
   }

   public double Masse
   {
      get{ return Volumen * Rho;}
   }

   public Bitmap Shape
   {
      get{ return shape;}
   }

   public Kugel(double radius, double rho)
     : base(rho)
   {
      this.Radius = radius;
   }
}					

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public class MyForm : Form
{

   private Kugel[] meineKugeln;

   public MyForm()
   {
       //Neues Array von Kugeln
       InitializeComponents();
       meineKugeln = new Kugel[3];

       meineKugeln[0] = new Kugel(100, 0.1);
       meineKugeln[1] = new Kugel(120, 0.2); 
       meineKugeln[2] = new Kugel(150, 0.1); 
   }

   public DrawKugel(int ID, int X, int Y)
   {
       using(Graphics g = this.CreateGraphics())
       {
          g.DrawImage(meinKugeln[ID].Shape, X, Y);
       }
   }

   private button1_Click(object sender, EventArgs e)
   {
      DrawKugel(1, 0,0);
   }

   private button2_Click(object sender, EventArgs e)
   {
      DrawKugel(2, 150,150);
   }

   private button3_Click(object sender, EventArgs e)
   {
      DrawKugel(3, 0,300);
   }
}					

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   public DrawKugel(int ID, int X, int Y)
   {
       using(Graphics g = this.CreateGraphics())
       {
          g.DrawImage(meinKugeln[ID].Shape, X, Y);
       }
   }
{					

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Z_wert=Z_wert-5;
        Z.Location= new System.Drawing.Point(Z_wert, 50);					

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public void DrawKugel(int ID, int X, int Y)
{
   using(Graphics g = this.CreateGraphics())
   {
       g.DrawImage(meineKugeln[ID].Shape, X, Y);
   }
}					

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private BufferedGraphicsContext context = BufferedGraphicsManager.Current;

public void DrawKugel(int ID, int X, int Y)
{
   
   context.MaximumBuffer = New Size(this.Width + 1, this.Height + 1)


   using(BufferGraphics bg = context.Allocate(this.CreateGraphics(), 
            New Rectangle(0, 0, this.Width, this.Height))
   {
      {
          bg.Graphics.DrawImage(meineKugeln[ID].Shape, X, Y);
          bg.Render();
      }
   }
}