Assembly: System.Design (in system.design.dll)
In a visual designer, when you switch from Source to Design view, the markup that describes a control that is derived from the BaseDataBoundControl class is parsed and a design-time version of the control is created on the design surface. When you switch back to Source view, the design-time control code is persisted to the markup source and edited into the markup for the Web page.
Designers that are derived from the BaseDataBoundControlDesigner abstract base class provide design-time support for controls that are derived from the BaseDataBoundControl class.
Windows 98, Windows 2000 SP4, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.