When implemented, sets control state before rendering it on the design surface.
The IDictionary containing the control state.
In overridden controls, this method is used to retain and set state for the control during design-time mode. This method is used only by control designers.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.