How to fix "No overload for method ' ' takes 0 arguments"?

Solution 1:

It's telling you that the method "output" needs arguments. Here's the signature for "output":

public override void output(double o, double tw, double th, double f)

So if you want to call that you need to pass in four doubles.

fresh.output(thing1,thing2,thing3,thing4);

Or to use hard coded values as an example:

fresh.output(1,2,3,4);

There's no method named output that takes 0 arguments, there's only one that accepts 4 arguments. You must pass parameters to output():

foreach (Numbers fresh in chosen)
{
    fresh.output(o, tw, th, f);
}