Sometimes its useful to see the list in the immediate window rather than looking in the watch window. You can easily see more results than the first 100 by using:
yourList.Skip(100).ToArray()
Which really doesn’t take long to write and works well – was useful for me.
Update: As pointed out in the comments below, this answer is actually wrong and applicable ONLY to collections and NOT to objects with lots of properties. I’m leaving it here as lots of people seem to have found it useful.