This method can be invoked when a caller gets a value from BaseType.
The default implementation might return an internal constant that represents the Object if UnderlyingType is null.
Override this method if you are not relying on default internal CLR reflection and are using metadata or other techniques for reporting the XAML type system information or schema information of a type.
LookupBaseType is virtual, and therefore, can be overridden. The override has the potential (whether for malicious purposes or otherwise) to change the reported type information about a XAML type so that it no longer aligns in an expected way with the type system information of its underlying CLR type. For any security-critical checks of assignment operations and access, use the underlying CLR type instead.
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)