Gets a value that indicates whether a directory exists in the virtual file system.
Assembly: System.Web (in System.Web.dll)
Override the method to indicate to the compilation system that the resource represented by virtualDir exists in the virtual file system provided by this VirtualPathProvider instance.
If your custom VirtualPathProvider class does not support directories, the method should return false.
If your virtual file system will contain themes for the Web site (by creating a virtual App_Themes directory), your custom VirtualPathProvider class must support directories.
The following code example is an implementation of the method in a custom VirtualPathProvider class. For the full code required to run the example, see the Example section of the VirtualPathProvider class overview topic.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.