Occurs before the Insert method is called.
Assembly: System.Web (in System.Web.dll)
The method is called to perform additional processing before the Insert method is called.Notes to Implementers
This method allows implementers to define processes that must be performed before inserting an element into the underlying collection. By defining this method, implementers can add functionality to inherited methods without having to override all other methods.
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.