How to resolve the issue of not being able to close a new window in WPF?

If you are unable to close a new window opened in a WPF application, you can try the following solution:

1. The opening in a building that allows light to enter and provides a view of the outside.
2. Display in the taskbar
3. correct

<Window ...
        ShowInTaskbar="True">
    ...
</Window>

1. “I need to close the window.”
2. Proprietor
3. Proprietor

NewWindow newWindow = new NewWindow();
newWindow.Owner = Application.Current.MainWindow;
newWindow.Show();

1. Shut it.
2. Press the button

private void CloseButton_Click(object sender, RoutedEventArgs e)
{
    this.Close();
}

1. Close the current application.
2. Press

private void CloseButton_Click(object sender, RoutedEventArgs e)
{
    Application.Current.Shutdown();
}

Following the above steps should resolve the issue of being unable to close a new window opened in a WPF application.