System.ServiceModel 4.0.0.0 DefaultConstructorConstraint System.Configuration.ConfigurationElement System.ServiceModel.Configuration.ServiceModelConfigurationElementCollection<TConfigurationElement> TConfigurationElement System.Collections.ICollection To be added. To be added. An abstract base class for a looking for a merge semantic similar to an that allows duplicates, but throws an exception when duplicates are found in the same configuration scope (e.g. same configuration file). Method 4.0.0.0 System.Void To be added. Adds a to this collection. The to add. Property 4.0.0.0 System.Boolean To be added. To be added. Gets a Boolean value that indicates whether an attempt to add a duplicate to this collection causes an exception to be thrown.