Generic base class wraps nested generic class to reduce type argument specification: Is there a name for this pattern?

Question

Ok question title is far from being self-explanatory. I see myself doing this often:

From this answer:

public static class Equality
{
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Answer 1

I don't think you've followed any one pattern here.

I would say that by replacing multiple "CreateComparer" methods with a single "Create" method, you have just simplified a Creation Method pattern. You could in a sense say it was a sort of a Factory pattern?! Or maybe a Builder pattern - that one is open to interpretation I guess?!

By embedding "Impl" within "Equater" you have sort of followed the Command pattern - encapsulating method invocation so that your calling code doesn't know about how it's getting done.

Anyway, sorry I can't be more helpful than that or give you a definite answer! Anyway, hope it helps!