static void Main()
{
Application.EnableVisualStyles();
Application.SetCompatibleTextRenderingDefault(false);
BaseForm form = new DerivedForm1();
form.Show();
Application.Run(FormManager.Instance);
//Application.Run();
//Application.Run(form);
}
private void button1_Click(object sender, EventArgs e)
{
BaseForm form = new DerivedForm1();
form.Show();
}