Question

I use a login from to access the main application. There is a logout option from the main application, which i’m not able to implement, even after googling and trying some things like:

Application.Restart();

or

Application.OpenForms["loginForm"].ShowDialog();
mainForm.Close();

Help needed to implement a simple logout option. There’s an exception thrown, smth like:

InvalidOperationException: Collection was modified; enumeration operation may not execute.

Thnx in advance.

Answer 1

What I would do is to hide the main window and display the login form. After the new login just check if the main form exists and show it with the new data (for the new user) or just close it and open a new one.

Another solution would be maybe to have a controller method that displays the forms. For example have a loop that displays the login form, then the main form. When the main form is closed the login form will be displayed again.