Feb 21, 2011 at 8:45 PM
Edited Feb 21, 2011 at 8:47 PM
From your screenshot, it is clear that, at the point the exception occurred, the map object was still null. That's probably because you have not yet
specified the line
map = Content.Load("Maps\\Map01");
as per step 11 within the LoadContent method (which is actually called by XNA
before the Initialize method).
You cannot assume that the program will always compile and/or run properly after each and every step in the tutorial :)
If you still have problems however, you could paste the source of Game1.cs as a post in here and I will have a look.