Returns whether this XamlMember represents an intended read-only property.
Assembly: System.Xaml (in System.Xaml.dll)
The default implementation returns true if UnderlyingMember exists, but a public set accessor does not exist for it, as determined by internal reflection.
This method is invoked when a caller gets a value from IsReadOnly. Override this method if you want to report uniform results for an entire XamlMember derived class, or if you have specialized metadata available that can be interpreted to determine XAML type system representations on a per-case basis.