How to Use ApiResponse Without a Return Type?

[sdepouw]

Hello. I have a simple scenario: Hit an endpoint that returns nothing, but be able to inspect the response code/etc.

If I didn't care about the response I'd do something like:

[Post("/foo")]
public Task Foo(RequestBody request, CancellationToken cancellationToken);

And if the HTTP hit returned some response, I'd model it with ApiResponse<T>:

[Post("/foo")]
public Task<ApiResponse<ResponseDTO>> Foo(RequestBody request, CancellationToken cancellationToken);

However, what if there is no response? ApiResponse (without type) is internal and cannot be used. I suppose technically there's always some content response (in the form of an empty string), but I think it'd be silly to have to define my endpoint/contract as "this returns a string" when one is never returned. So for now, my workaround is this:

[Post("/foo")]
public Task<ApiResponse<string>> Foo(RequestBody request, CancellationToken cancellationToken); // the string is always empty, but users of this client won't know that!

Is there a way to use ApiResponse so I can check the status code, ensure success, etc. without having to provide a type?