Specifies whether or not the extension appears in the extension manager dialog allowing users to selectively turn it off and on.

Namespace: http://schemas.esri.com/Desktop/AddInsSchema: DesktopAddIns_ElementOnly.xsd

<xs:attribute name="showInExtensionDialog" type="xs:boolean" use="optional" xmlns:xs="http://www.w3.org/2001/XMLSchema"></xs:attribute>