'<typename>' cannot inherit from <type> '<basetypename>' because it expands the access of the base <type> outside the assembly
A class or interface inherits from a base class or interface but has a less restrictive access level.
For example, a Public interface inherits from a Friend interface, or a Protected class inherits from a Private class. This exposes the base class or interface to access beyond the intended level.
Error ID: BC30910
To correct this error
Change the access level of the derived class or interface to be at least as restrictive as that of the base class or interface.
-or-
If you require the less restrictive access level, remove the Inherits statement. You cannot inherit from a more restricted base class or interface.
See Also
Concepts
Reference
Class Statement (Visual Basic)