Gets or sets the name and path of the file containing the user control.
Assembly: System.Web (in System.Web.dll)
This property specifies the name and path of the file containing the user control implementation. It applies only to user controls. The path may be relative to the application or the application root.
The user control itself must not be in the same directory as the page. If it is, you get a run-time error when you attempt to load the page.
Available since 2.0