The PDF would highlight the following critical improvements introduced in XE2:
Clients must call Login before invoking protected methods. Delphi XE2 DataSnap Development Essentials.pdf
Have you used the Delphi XE2 DataSnap Development Essentials guide? What was your biggest "aha!" moment? Share your experience in the comments below or on the Delphi subreddit. The PDF would highlight the following critical improvements