Tom Barnaby & Jason Bock 
Applied .NET Attributes [PDF ebook] 

Attributes are used to modify the runtime behavior of code in the .NET Framework. Applied .NET Attributes explores the application of .NET attributes and how developers can write custom attributes that provide the maximum level of code reuse and flexibility.Attributed programming is a feature of .NET that is still relatively unexplored and unknown. Because attributes are used to modify the runtime behavior of code in the .NET Framework, their use is extremely important and will become even more important over time. This insightful guide covers the fundamentals of attributes, common .NET attributes, the use of custom attributes, and advanced techniques.