System.Design 2.0.0.0 System.IServiceProvider System.Runtime.InteropServices.Guid("cff39fa8-5607-4b6d-86f3-cc80b3cfe2dd") To be added. Provides an interface for accessing a Web application in a design host, such as vsprvsext, at design time. Method System.Web.UI.Design.IProjectItem To be added. Returns a project item from a design host based on its URL. A project item from a design host based on its URL. The relative path to the project item to retrieve. 2.0.0.0 Method System.Configuration.Configuration To be added. Returns a object representing the current Web application in the design host. An object representing the current Web application in the design host. true to indicate the returned is editable; otherwise, false. 2.0.0.0 Property System.Web.UI.Design.IProjectItem To be added. To be added. Gets the root project item from the design host. 2.0.0.0