Windows Phone 8 development - Change icon color depending on phone background

Smart way to change icon color:

<Border x:Name="Wifi" Width="76" Height="76" 
                    HorizontalAlignment="Right" VerticalAlignment="Bottom" 
                    Background="{StaticResource PhoneForegroundBrush}"                                Margin="0,0,360,82" Tap="WhenTappedWifi" >
        <Border.OpacityMask>
             <ImageBrush ImageSource="Assets/Tiles/Custom/wifi.png" />
        </Border.OpacityMask>
</Border>

Source: http://igrali.com/2012/01/21/make-image-visible-on-both-white-and-black-background-theme-color-on-windows-phone/

Windows Phone 8 - Navigate To and From Page

I needed a solution to change the state of an element when going back to the page where it was.
I tried the Loaded event, but this did not do the trick.
What worked was Page Navigation:

protected override void OnNavigatedFrom(System.Windows.Navigation.NavigationEventArgs e)
{
    base.OnNavigatedFrom(e);

    // code
}

protected override void OnNavigatedTo(System.Windows.Navigation.NavigationEventArgs e)
{
    base.OnNavigatedTo(e);

    // code
}

Source: http://nicksnettravels.builttoroam.com/post/2011/03/07/Windows-Phone-7-Tombstone-Frustration.aspx

Windows Phone 8 Apps - Icon collection sources

I have found myself looking for icons many times.
So I have decided to create a list with good sources.
Here it is, to be continued...

http://www.geekchamp.com/icon-explorer/introduction

Windows Phone 8 - Launch built-in apps - LaunchUriAsync

Few functions with LaunchUriAsync method:

http:[URL]	To launch web browser and navigate to specific web URL address
mailto:[email-address]	To launch email app with To is set to email-address specified
ms-settings-accounts:	To open Account Settings app
ms-settings-airplanemode:	To launch Airplane Settings app
ms-settings-bluetooth:	To launch Bluetooth Settings app
ms-settings-cellular:	To open Cellular Settings app
ms-settings-emailandaccounts:	To launch Email and Accounts Settings app
ms-settings-location:	To display Locations Settings app
ms-settings-lock:	To launch Lock Screen Settings app
ms-settings-wifi:	To open Wi-Fi Settings app
zune:navigate?appid=[App Id]	To navigate to app details page on Windows Phone Store
zune:reviewapp	To open review page for calling app on Windows Phone Store
zune:reviewapp?appid=[App Id]	To launch reviews page for specified app
zune:search?[search parameter]=[value]	To search Windows Phone Store
zune:search?keyword=[search keyword]&contenttype=app	To search Windows Phone apps by keyword
zune:search?publisher=[publisher name]	To launch Windows Store and search publishers apps

Example:

private async void WhenTappedWifi(object sender, System.Windows.Input.GestureEventArgs e)
        {
            Uri uri = new Uri("ms-settings-wifi:");
            await Windows.System.Launcher.LaunchUriAsync(uri);
        }

Source:

http://www.kodyaz.com/windows-phone-8/LaunchUriAsync-to-launch-built-in-apps-from-windows-phone-app-code.aspx