MinRuntimeVersion (Silverlight Plug-in Object)

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Sets a value that indicates the earliest Silverlight version that is required in order to run a Silverlight-based application.


object Element

<object ...>
  <param name="minRuntimeVersion" value="version"/>




Not available.


Not available.

Managed Code

Not available.

Property Value

The version of Silverlight that is required by the application. The default is the currently installed version, or null if Silverlight is not installed.


The format of the version string is described in the IsVersionSupported topic.

If an upgrade is required, the Silverlight plug-in displays the message "Click to install the required version". Additionally, if you set the AutoUpgrade property 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.