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 leads me to believe that I have to make a button which the user clicks to see if there is an update. But I don't want the user to have to click a button every day to see if there is an update. I want the application to check by itself if there is a new .xap file and if there is, let the client ask the user if he wants the update.

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?