Question

I need close current main window and show new main window.
First load Main.

static class Program
{
    [STAThread]
    static void Main()
    {
        var main = new Main();
        Application.Run(main);
    }
}

In event main I need close and show new clear Main.
I tried so:

private void ChangeUsers()
{
    this.Visible = false;
    var window = new Main();
    window.Show();
    this.Close();
}

but this not correct work.

Answer 1

This shows the form modally and lets the form return a DialogResult to indicate whether to re-show the form.

static class Program
{
  [STAThread]
  static void Main()
  {
      Main main;
      do
      {
         main = new Main();
      } while (DialogResult.OK == main.ShowDialog ());
  }
} 

private void ChangeUsers()
{
    this.DialogResult = DialogResult.OK;
    this.Close();
}