Is it possible to remove DLL dependency due to interface?-Collection of common programming errors

Let’s say my library class (in assembly A) have a method GetFoo() returns a type Foo. Foo implements several interfaces, including IBar in assembly B. When a client code calls GetFoo() (the client code does not reference assembly B), the compiler will gives an error, because IBar “is defined in an assembly that is not referenced. You must add a reference to assembly B”. Note that my code only needs to know about Foo, and it contains no reference to the interface.

Is it possible to not have to reference B? As far as I know there is no need for the runtime to know about it.