System.Design 2.0.0.0 Implement the interface to describe a custom data source at design time. For example, the , , and classes implement the interface. Classes that implement the are used by custom control designer components to provide lists of fields and views for data-bound controls at design time. Provides basic functionality for describing the structure of a data source at design time. Method 2.0.0.0 System.Web.UI.Design.IDataSourceViewSchema[] A class that implements the method returns an array of objects that implement the interface. For example, in the array returned by the method, each element of the array is a object that implements . Gets an array of schema descriptors for views contained in the data source. An array of objects.