Why forms dosn't dispose?

[neodatatype]

Hi all,

Take this sample:

public class F : Form
{
private System.Windows.Forms.Button button1;
   F()
   {
      this.button1 = new Button();
      this.button1.Click += new System.EventHandler(this.button1_Click);
   }

   private void button1_Click(object sender, System.EventArgs e)
   {
       F f = new F ();
       f.Show();
   }

   [STAThread]
   static void Main() 
   {
       Forms.Application.Run(new F());
   }
  
}

Into button1_Click I create a new F() but this form does not get disposed as I aspected (f go out of scope!).

The strange is that if I do this with some other class type (try with a new Class1) this get disposed!

Why they have differents behaviors?

Thanx!