Soma on the Key Themes for Visual Studio 2010

vs2008 already does what you describe
if you have a method, Foo, you can add a comment to it by typing three slashes : ///. this will genereate a comment like this: (note the 3 slashes instead of 2)

/// <summary>
///
/// </summary>
/// <param name="arg"></param>
public void Foo (String arg){}

whatever you put in the summary tag will appear in the intellisense and what ever you put in each argument tag will appear in the intellisense for each argument. intellisense comments also show up if you mouse over the method

btw, to compile a helpfile, go into the project proerties and go to the build tab. at the bottom you'll find a checkbox called XML documentation file:. check it and all the comments in the format i mentioned will get compiled into there.

when you reference the dll/exe in another project, you comments will show up as long as that generated xml file is in the same directory as the referenced file

no problem most people here on channel9 and the msdn forums are happy to help out new VS users (some arent but never mind those)

ive only really used netbeans for ruby development so im not that familiar wit the java experience
you can invoke intellisense by hitting ctl-space (or possebly alt or * space in the default key mapping) to show members that starts with whatever you've written

check out the edit > intellisense menu. you can change those hotkeys in the tools > options >environment >keyboard options

VS doesnt show you all the docs at once like netbeans, instead, the docs for the method is shown if the cursor is over the method, and each paramater if the cursor is on the parameter.

the parameters arent shown while the cursor is on the method body because the diffrent overloads may have diffrent arguments meaning diffrent things. experiment with typing . after a a string for instance and try starting to type the parameters to a method and see what shows up

if you want something like the navigator window. you can use the two drop down menus at the top of the ide.
the right one shows the the types in the current file (c# can have multiple types in a file) and the left one shows the members in the selected type

also, you can check out the object browser (view > object browser) from there you can browse all the namespaces referenced in your project and also view the comments for classes and methods

i also have a java background from my school days and ive been a c# dev all my prof life. you'll find that c# is more of a superset of java when it comes to functionality with events and delegates (although events are actually delegates) and linq and attributes and various other things

you should note though that c# is not a native language. c# is compiled to byecode and then jitted to native code at runtime

you should check out the msdn docs on visual studio and c#
http://msdn.microsoft.com/en-us/library/52f3sw5c.aspx

ive learned pretty much everything i know aboud c# and vs from there