AutoUpgrade (Silverlight Plug-in Object)
Sets a value that indicates whether a Silverlight plug-in version earlier than the specified minRuntimeVersion will attempt to update automatically.
Setting autoUpgrade has no effect unless you also set minRuntimeVersion.
If an upgrade is required and you set autoUpgrade to true, the plug-in will prompt the user to upgrade and then to restart the Web browser.
If an upgrade is required, the following errors occur, regardless of the autoUpgrade setting:
8001 - Upgrade required.
8002 - Browser restart required.
You can respond to these errors in an OnError handler in order to display your own upgrade and browser restart messages. In this case, however, you typically do not set autoUpgrade to true.