ConfigurationElementCollection.BaseAdd Method (ConfigurationElement)
Assembly: System.Configuration (in system.configuration.dll)
Use the BaseAdd method to add a new ConfigurationElement to the collection. Override it in a derived class if custom behavior is required when the element is added.
When adding, an element is considered a duplicate only if the keys are identical but the values are different. Elements with identical keys and values are accepted silently because the elements do not compete. However, an element with an identical key but a different value cannot be added because there is no logic to determine which of the competing values should be honored.
Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.