Visual Studio window which shows list of methods

I found how to turn the drop down on as shown in the first answer (@ChrisF):

Go to Options->Text Editor->(your language)

and tick "Navigation bar" in the display section.

Since Visual Studio 2012, you can view the outline ( fields and methods) in the solution explorer by expanding the node corresponding to your file .

There's a drop down just above the code window:

It's called Navigation bar and contains three drop downs: first drop down contains project, second type and third members (methods).

You can use the shortcut Ctrl + F2 (move focus to the project drop down) and press Tab twice (move focus to the third drop down) to focus it, down arrow will expand the list.

Full size image