Objected oriented programming with c# PDF Download

 Object oriented programming is a programming language in which programmer not only define the data type of data structure as well as also deal with behaviour (function) of data structure that can be applied to data structure.In this way data structure becomes a object which include state and behaviour of an  object.Basically, OOP is not a language,it is collection of some techniques use din c++.This book includes all these techniques such as inheritance,polymorphism,abstraction etc which will help you in understanding different techniques related OOP.
Download OOP book  from here.