Gets or sets that the name for the current building block is a built-in building block which should not be displayed in the user interface. This information can be used by an application as needed, for example, to disambiguate an building block from one with the same name, ensuring that the built-in building block can be uniquely identified by the application.

'Declaration
 
Public Property BuiltIn As System.Boolean

public System.bool BuiltIn {get; set;}