I like Essential C# 5.0 for reading cover to cover and C# 5.0 in a Nutshell as a reference. If you have already "mastered" Head First C# the latter might suit you better.
I found this one to be quite helpful. http://www.amazon.com/CLR-via-C-Dev...TF8&qid=1396217726&sr=8-1&keywords=clr+via+c#