What is the syntax for adding some generic type of component without an object reference?

Questions & Answers
1

I want something like this, 

 void M <T> (T t) {go.AddComponent<T>()};

but with the ability to just do something like

M(BoxCollider);

How?

2

Something like this:

void M <T>() { go.AddComponent(typeof(T)); }

then you'd just use 

M<BoxCollider>();