I am new at vb.net and would like to know

What object is streamwriter located under?
Is it a function or sub routine?

VS 2003:
I have a project with the folowing in code behind:

Dim sw As StreamWriter

I thought maybe I could drill down in the objects and find it.

I assume that is under System.IO?

I did an Ctrl ALT J in visual studio to look at the classes
and I cannot drill down to streamWriter?

Where can I find where streamwriter is located?