This member overrides Control.SaveControlState(), and more complete documentation might be available in that topic.
Saves any server control state changes that have occurred since the time the page was posted back to the server.
Assembly: System.Web (in System.Web.dll)
Use the method to save state information required for the operation of the ChangePassword control. This control state data is stored separately from the view state data for the ChangePassword control.Notes to Inheritors
When control state is saved, a string object is returned to the client as a variable that is stored in an HTML <input type="hidden" /> element. Override the method to extract the state information to use in the ChangePassword control.
Control state is intended for small amounts of critical data, such as a page index or a keyword. Using control state for large amounts of data can adversely affect page performance.
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)