Raises the Init event and makes sure that only one ScriptManager control exists on the page.
protected internal override void OnInit(
The event data.
More than one instance of ScriptManager exists on the page.
When overriding this method, call the base OnInit method so that script files are correctly handled for partial-page rendering.
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.