Assembly: Microsoft.SharePoint (in microsoft.sharepoint.dll)
If the SPWebTemplate represents a site definition configuration, this property is a concatenation of the Name attribute of a <Template> element in a WebTemp*.xml file and the ID attribute of one of the child <Configuration> elements of the Template element. (See WebTemp.xml for more information.) There is a "#" character in between the two parts; for example "MPS#1" or "MyCustomSiteDefinition#0".
If the SPWebTemplate represents a site template, this property returns the name of the file, in the SharePoint database, that stores the template; for example, "PersonalPage.stp".