That's a pity, because the easiest way to do it is to use the built in XML comments system...
http://msdn.microsoft.com/en-us/magazine/cc302121.aspx[
^] - it's an old article, but it gives you the idea.
If you use XML comments (and it's very simple - just start a blank line with "///" above a field, property of method definition and it will do the rest) then you can build documentation from this very easily. And as an extra incentive, the XML comments are transferred into Intelisense as well.
One of the first things I do when I create a new project is to turn on XML enforcement: On the Build tab of the Project Properties, tick the XML Documentation file checkbox. You will then get warnings with each compilation where you haven't documented a method properly. If you also check the "All" radio button under "Treat warnings as errors" on the same tab (as I do) then you can't even run your program unless you have documented it correctly.