A read-only property that returns a reference to the XDocuments collection.
expression.XDocuments
expression Required. An expression that returns a reference to the Application object.
0: Can be accessed without restrictions.
After you have set a reference to the XDocuments collection, you can use its properties to access each of the XDocument objects that it contains.
In the following example, the XDocuments property is used to access the Count property of the XDocuments collection and display the value in a message box:
XDocument.UI.Alert("Count of XDocuments: " + Application.XDocuments.Count);