Converting Tuple to Class in method return values and other places

I often will create a class that returns a small tuple, maybe (IEnumerable<Data> Rows, int TotalRows)
and I find this OK
But then after a while I might want to extend it a bit, eg (IEnumerable<Data> Rows, int TotalRows, double TimeTakenInSecs)

and at about this point, especially if its to be reused in several places (even just a few methods) then I'd like to convert it to a class/struct.

Tuples have become more important since async task methods cannot have out params.

But, I cant find any way to do this in R#, and that really surprises me, so I fear I must be missing something