C# Professional

O'Reilly

C# Cookbook: Modern Recipes for Professional Developers

Wrox

Professional C# and .NET                        

Addison Wesley

Code That Fits in Your Head : Heuristics for Software Engineering (Robert C. Martin)

C# for Beginners: A Step-by-Step Guide to Mastering C# Programming: Learn C# Fast: Complete Guide with Examples and Exercises to become a professional (English Edition)

Wrox

Professional C# 7 and .net Core 2.0              

John Wiley & Sons

Professional C# 2005                            

Microsoft Press

CLR Via C#: Developer Reference                  

C# PROGRAMMING FOR GUI DEVELOPMENT: A Comprehensive Guide to Designing Professional GUI Applications Using C# (English Edition)

Galileo Computing

Visual C# 2010: Das umfassende Handbuch (Galileo Computing)

Wrox

Professional C# 4.0 and .NET 4