When overridden in a derived class, adds the attributes of the inheriting class to the specified list of attributes in the parent class.
Assembly: System (in System.dll)
For duplicate attributes, the last one added to the list is kept.
The IList with the attributes is created once. If there are duplicate attributes in the list, only the first instance is saved; all subsequent duplicate attributes are removed from the list.
Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune
The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.