C# Winform The process still on Windows Task list manager after close programme

Question

why The process still on Windows Task list manager after close programme ?

i use login Form.cs

 [STAThread]
        static void Main()
        {
             


        

Answer 1

i follow code the @lazyberezovsky and add this on my Login.cs

  private void simpleButton_Valider_Click(object sender, EventArgs e)
        {
       .....
          DialogResult = DialogResult.OK;
                    return;
       .....
   }