No icon in task bar

Question

I have default settings for application icon, it appears normally in title window , alt-tab menu, explorer, etc. but in taskbar it is shown like this:

How to fix this and get normal icon in taskbar?

Answer 1

Right-click on the windows and select the Properties and apply the icon like the image

Answer 2

One of my problems was related to loginDialog. It is possible to get an icon in taskbar using custom icon, but still problem with standard icon is present.

        var loginDialog = new LoginView();

        loginDialog.Loaded += (sender, args) => {
            var window = loginDialog.ParentOfType<Window>();
            if (window != null) {
                window.ShowInTaskbar = true;
                window.Icon = BitmapFrame.Create(new Uri("pack://application:,,,/App;component/Themes/MainIcon.png"));
            }
        };