formclosing – Make Me Engineer

How can I prevent a user from closing my C# application?

June 4, 2023 by Tarik

No, it is not possible to prevent Task Manager from closing your application. Task Manager can forcibly terminate a process that is not responding; it doesn’t need the application’s permission to close it, and it doesn’t ask nicely, either. (See this answer for more on Task Manager, and a comparison between the different ways that … Read more

Awaiting Asynchronous function inside FormClosing Event

October 2, 2022 by Tarik

The best answer, in my opinion, is to cancel the Form from closing. Always. Cancel it, display your dialog however you want, and once the user is done with the dialog, programatically close the Form. Here’s what I do: async void Window_Closing(object sender, CancelEventArgs args) { var w = (Window)sender; var h = (ObjectViewModelHost)w.Content; var … Read more