SPWebTemplate.IsHidden property
SharePoint 2013
Gets a value that indicates whether the site definition configuration is displayed in the user interface as one of the optional configurations used for creating new sites.
Assembly: Microsoft.SharePoint (in Microsoft.SharePoint.dll)
Property value
Type: System.Booleantrue if the SPWebTemplate represents a site definition configuration and the configuration is not displayed; otherwise, false.
If the SPWebTemplate represents a site definition configuration, this property corresponds to the Hidden attribute of a Configuration element in a WebTemp*.xml file. (See WebTemp.xml for more information.)
If the SPWebTemplate represents a Web template, this property always returns false.