Get all open WPF windows

Question

I'm trying to get all open windows. I tried to use System.Windows.Application.Current.Windows but I get Null Pointer Exception in line where foreach loop is. Do anyone has idea what is wrong?

public Window getWindow(String Title)
{
    Window windowObject = null;
    Console.WriteLine("Inside getWindow");
    foreach (Window window in System.Windows.Application.Current.Windows)
    {
        if (window.Title == Title)
        {
            windowObject = window;
        }
    }
    return windowObject;
}

Answer 1

This is how you cycle through all opened windows in an running application in WPF:

foreach (var Window in App.Current.Windows)
        { 
           // TODO: write what you want here
        }

If you want know in windowforms use application instead of app. bye.

Answer 2

Either Current or Windows is null

The Windows property can only be access from the thread that created the Application object and this will only work in a WPF application AFTER the application object has been created.