'Declaration Public Property RequestContext As AsyncRequestContext
public AsyncRequestContext RequestContext {get; set;}
Notes for IncludePreviousSelectedTab and IncludeAllTabs: it may slow down performance on the client and slightly speed up performance on the server. If a child control located on the ContentPane of tab renders its data field outside of the DIV element of ContentPane, then data of that control will be lost.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2