Modifier for a class you want as a base class only and making not accessible to external assemblies

I have a base class for other classes:

public class ApiGetOutcome
{// stuff }

public class ApiGetOutcome
{// stuff }

and I inherit it thus:

public class ApiGetFileOutcome: ApiGetOutcome
{// stuff }

public class ApiGetFileOutcome: ApiGetOutcome
{// stuff }

These are all in a class library which accesses an API.

I don't want

ApiGetOutcome

ApiGetOutcome

visible outside the library, only

ApiGetFileOutcome

ApiGetFileOutcome

I've messed around with

abstract

abstract

and various modifiers, but can't seem to crack it. Would appreciate a steer!

C#•2y ago•

7 replies