Simple WPF sample causes uncontrolled memory growth

Question

I have boiled down an issue I\'m seeing in one of my applications to an incredibly simple reproduction sample. I need to know if there\'s something amiss or something I\'m missi

Answer 1

Edit 2: Obviously not the answer, but was part of the back-and-forth among answers and comments here, so I'm not deleting it.

The GC never gets a chance to collect those objects because your loop and its blocking calls never end, and therefore the message pump and events never get their turn. If you used a Timer of some sort so that messages and events actually have a chance to process, you probably wouldn't be able to eat up all your memory.

Edit: The following does not eat up my memory as long as the interval is greater than zero. Even if the interval is just 1 Tick, as long as it isn't 0. If it's 0, we're back to the infinite loop.

public partial class Window1 : Window {
    Class1 c;
    DispatcherTimer t;
    int count = 0;
    public Window1() {
        InitializeComponent();

        t = new DispatcherTimer();
        t.Interval = TimeSpan.FromMilliseconds( 1 );
        t.Tick += new EventHandler( t_Tick );
        t.Start();
    }

    void t_Tick( object sender, EventArgs e ) {
        count++;
        BuildCanvas();
    }

    private static void BuildCanvas() {
        Canvas c = new Canvas();

        Line line = new Line();
        line.X1 = 1;
        line.Y1 = 1;
        line.X2 = 100;
        line.Y2 = 100;
        line.Width = 100;
        c.Children.Add( line );

        c.Measure( new Size( 300, 300 ) );
        c.Arrange( new Rect( 0, 0, 300, 300 ) );
    }
}