Gets or sets the type information for this extension.
Assembly: System.Xaml (in System.Xaml.dll)
Unless this instance was deliberately instantiated with the TypeExtension(Type) signature constructor, this value will be null. This property will not be reset when ProvideValue is called. If you want the true type represented you should always call ProvideValue rather than check this property.
This property is settable per usual rules regarding markup extension usage. However, if you are setting with a Type, then the purpose of this markup extension is irrelevant, because the same Type is returned from a ProvideValue call.
Available since 3.0