LINQ to XML Dynamic Properties
This section provides reference information about the dynamic properties in LINQ to XML. Specifically, these properties are exposed by the XAttribute and XElement classes, which are in the System.Xml.Linq namespace.
As explained in the topic Overview of WPF Data Binding with LINQ to XML, each of the dynamic properties is equivalent to a standard public property or method in the same class. These standard members should be used for most purposes; dynamic properties are provided specifically for LINQ to XML data binding scenarios. For more information about the standard members of these classes, see the XAttribute and XElement reference topics.
With respect to their resolved values, the dynamic properties in this section fall into two categories:
Indexed values, such as the Elements and Descendants properties of XElement, that resolve into an indexer type. For indexer types to be resolved to the desired value or collection, an expanded name parameter must be passed to them.