Gets a value that indicates whether this XamlType represents a type that cannot be resolved in the underlying type system.
Assembly: System.Xaml (in System.Xaml.dll)
For a load path that involves XamlObjectWriter, a XamlType that has true for cannot be written into an object graph. Under the default implementations in System.Xaml , the XamlObjectWriter.WriteStartObject call throws a XamlObjectWriterException when the relevant XamlType reports true for . You should not pass a XamlType that has as true unless you are prepared to handle the exceptions from XamlObjectWriter, or you have other ways to adjust the XamlObjectWriter behavior or the XAML node stream prior to writing the object graph.
Available since 4.0