I have made an out-of-browser silverlight application which I want to automatically update every time there is a new .xap file uploaded to the server.

When the user right-clicks the application and clicks on Updates, the default is set to "Check for updates, but let me choose whether to download and install them":

This leads me to believe that it is possible to make my Silverlight application automatically detect if there is a new .xap file present on the server, and if there is, the Silverlight client will automatically ask the user if he would like to install it.

• This however is not the case. I upload a new .xap file and the Silverlight application does nothing.

• Even if I add this to my App.xaml.cs:

--

private void Application_Startup(object sender, StartupEventArgs e)
{
    this.RootVisual = new BaseApp();
    if (Application.Current.IsRunningOutOfBrowser)
    {
        Application.Current.CheckAndDownloadUpdateAsync();
    }
}

and update the .xap file, the Silverlight application does nothing.

• This information enabled me to check if there is an update and if so, tell the user to restart the application, but when he restarts the application, nothing happens:

--

private void Application_Startup(object sender, StartupEventArgs e)
{
    this.RootVisual = new BaseApp();
    if (Application.Current.IsRunningOutOfBrowser)
    {
        Application.Current.CheckAndDownloadUpdateAsync();
        Application.Current.CheckAndDownloadUpdateCompleted += new CheckAndDownloadUpdateCompletedEventHandler(Current_CheckAndDownloadUpdateCompleted);
    }
}

void Current_CheckAndDownloadUpdateCompleted(object sender, CheckAndDownloadUpdateCompletedEventArgs e)
{
    if (e.UpdateAvailable)
    {
        MessageBox.Show("An application update has been downloaded. " +
            "Restart the application to run the new version.");
    }
    else if (e.Error != null &&
        e.Error is PlatformNotSupportedException)
    {
        MessageBox.Show("An application update is available, " +
            "but it requires a new version of Silverlight. " +
            "Visit the application home page to upgrade.");
    }
    else
    {
        //no new version available
    }
}

How do I make my Silverlight application check, each time it starts, if there is a new .xap file, and if there is, pass control to the Silverlight client to ask the user if he wants to download it, as the above dialogue implies is possible?