You can find an article of 5 pages concerning S.O.L.I.D. Software Design Principles (applied in C#) in the French Programmez magazine No.133 written by me and a colleague.
The article is written in French but as always I will write some English articles on my Blog in the next weeks. So stay tuned if you are interested in knowing how to write clean and robust code using the S.O.L.I.D. Principles.