How to load the designer form from the startup form, and closing the startup form at the same time.

Jan 9, 2012 at 6:32 PM

After starting the designer.cs form from the startup.cs form, how can the startup.cs form be closed(not hidden) without closing the designer form?

I tried creating a new thread, and it does close the startup form and starts a new thread with the designer form, but makes the form highly unstable, causing the file menu to be unclickable(other menus seem to work fine), and also sending the application to non responsive state as soon as the OpenFileDialog.ShowDialog() and SaveFileDialog.ShowDialog() are called.

Is there any way of doing it without creating a new thread(or perhaps pointing me to why the form becomes so unstable when I create one) or without using an MDI?