Question

Within my application, i use the hidden and visible porperties to make windows how or not show to the user.
Now at some point, when i am in Window1, i want to make a check if there is still a instance of the main window, that is hidden.
Googling, i found (also on SO) that i need to use this code:

Window deze = Application.Current.Windows.OfType<MainWindow>().Where(x => x.Name == "MainWindow").FirstOrDefault();   

But whatever i fill in for the part OfType<MainWindow> or for the "MainWindow" it keeps returning null, even when im 100% sure there must be 1 instance.

Checking in the code of the main window, that is called in the solution explorer (visual express) “mainWindow.xaml”
i see that the code looks like this:

namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {      
        //creating the exitmessage for use later on, after all, we want to use this in an other method.


        public MainWindow()
        {
......
        }

I really have no clue at all, why that “Window deze” keeps returning null when im 100% sure there is a hidden instance of the main window.

Anyone got an idea on this one ?
Im i just totally overlooking some logical solution ?

thanx in advance!

Answer 1

The Where is redundant, as you see it checks for a specific name, which does not concern you.