How do you force Firefox to not cache or re-download a Silverlight XAP file?

Question

When working with Silverlight, I've noticed that Firefox will cache the XAP file, so if I do an update, a user may be stuck using an outdated version. Is there a way to force the browser to either re-download the XAP file every time, or maybe only force it to after an update has been published? Or is there a setting in the Silverlight config that stops the browser from caching the XAP file altogether?

Thanks, jeff

Answer 1

The query string works perfectly, but I wouldn't use DateTime.Now, because it forces the user to re-download the app every time. Instead, we use the following:

protected void Page_Load(object sender, EventArgs e)
{
    var versionNumber = Assembly.GetExecutingAssembly().GetName().Version.ToString();
    this.myApp.Source += "?" + versionNumber;
}

This way all you have to do is increment the version number in the AssemblyInfo.cs file.