Assembly: System.Design (in system.design.dll)
In a visual designer, when you switch from Source to Design view, the markup source code that describes the AdRotator control 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.
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.