When deriving from SwaggerResponseAttribute only the first applied is used

[leppie]

Say I do this:

public class SwaggerErrorResponseAttribute : SwaggerResponseAttribute
{
    public SwaggerErrorResponseAttribute(HttpStatusCode code) : 
       base(code, type: typeof(Error))
    {
    }
}

Then apply that on class or method level, then the UI only shows the first one and that response is not present in swagger.json either.

[leppie]

.NET bug, reported (and PR submitted): dotnet/coreclr#6240

For a workaround: Just implement GetHashCode and, if needed, Equals to desired behavior.