OOPS CONCEPTS IN C# WITH EXAMPLES PDF

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There are some basic programming concepts in OOP: Abstraction object in an easy method. learn c# - c# tutorial - c# abstraction - c# examples - c# programs. Aug 8, Understand OOP concepts in C# and learn how to create a class. Get code examples and tutorials. If you want to go to the store, for example, you interact with a car object. OOP concepts started surfacing in the mids with a programming language called .


Oops Concepts In C# With Examples Pdf

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C# is a simple, modern, general-purpose, object-oriented programming language covers basic C# programming and various advanced concepts related to C#. A More Realistic Example Using Lists. An Example Using Dictionaries concepts are explored and demonstrated using the C# (pronounced C sharp). Here I will explain oops concepts in c# with examples or object oriented programming concepts in c#.net with real time examples or oops or object oriented.

Silverlight 2 is not a technology that is out there on its own fending for itself. Microsoft did a real good job integrating the technology with its other enterprise offerings. WCF allows architects to create a first class Service Oriented Architecture and it can be consumed by Silverlight clients. Adobe has nothing of the sort. In the Web 2. LINQ works inside Silverlight. It is a VERY powerful architecture option to be able to manipulate data structures fast and efficiently on the client rather than having to rely on the server.

This gives Silverlight simply a huge advantage in productivity and architectual capabilities.

Perception as an RIA business framework:- Perception is everything. When I speak to other developers about Silverlight, they are generally very excited and motivated to learn the technology. It essentially is very similar to Flash, which has been around for several years now. It is all about perception.

real time example in oops

For example, lets look at the iPhone when it launched last year Everyone and their mother lined up to get one, even though the phone was lacking major mobile technology that had been around for a couple years prior.

Another example is VB. NET vs C. NET has always been looked as the red headed step child in. NET when compared to C. C has the perception of a more mature, professional and advanced language.

For creating business applications you will probably find it a lot more developers, architects and dev managers rallying around and more comfortable with Silverlight rather than Flex. That percentage is even greater on business workstations. Microsoft can simply distribute the Silverlight 2 RIA framework on a level no other company can. Many IT engineers will like Silverlight since it is a Microsoft based technology. It will make it a lot easier to distribute to their employees.

Mesh:- Mesh right now is Microsoft's offering to sync up data between computers. It uses Silverlight as the UI. This is one area where since both Web 1. Mesh is going to be Microsoft's big splash into Web 3. What is great is that Silverlight is the UI for this huge "Internet 2" technology. What is the difference between Finalize and Dispose? Dispose is called by as an indication for an object to release any unmanaged resources it has held. Finalize is used for the same purpose as dispose however finalize doesnt assure the garbage collection of an object.

Dispose operates determinalistically due to which it is generally preferred. A type's Dispose method should release all the resources that it owns. It should also release all resources owned by its base types by calling its parent type's Disposemethod. The parent type's Dispose method should release all resources that it owns and in turn call its parent type's Dispose method, propagating this pattern through the hierarchy of base types.

To ensure that resources are always cleaned up appropriately, a Dispose method should be callable multiple times without throwing an exception. A Dispose method should call the GC. SuppressFinalize method for the object it is disposing.

If the object is currently on the finalization queue, GC. SuppressFinalizeprevents its Finalize method from being called. Remember that executing a Finalizemethod is costly to performance. If your Dispose method has already done the work to clean up the object, then it is not necessary for the garbage collector to call the object'sFinalize method. A Finalize method should not throw exceptions, because they cannot be handled by the application and can cause the application to terminate.

The garbage collector keeps track of objects that have Finalize methods, using an internal structure called the finalization queue.

Each time your application creates an object that has a Finalize method, the garbage collector places an entry in the finalization queue that points to that object. Polymorphism is one of the primary characteristics concept of objectoriented programming. Poly means many and morph means form. Thus, polymorphism refers to being able to use many forms of a type without regard to the details.

Polymorphism is the characteristic of being able to assign a different meaning specifically, to allow an entity such as a variable, a function, or an object to have more than one form. Polymorphism is the ability to process objects differently depending on their data types. Polymorphism is the ability to redefine methods for derived classes.

Types of Polymorphism Compile time Polymorphism Run time Polymorphism Compile time Polymorphism Compile time Polymorphism also known as method overloading Method overloading means having two or more methods with the same name but with different signatures Example of Compile time polymorphism Run time Polymorphism Run time Polymorphism also known as method overriding Method overriding means having two or more methods with the same name , same signature but with different implementation Example of Run time Polymorphism Example of Polymorphism in.

Net What is Polymorphism? Polymorphism means same operation may behave differently on different classes. Abstraction What is an Abstraction?

Abstraction is thinking about something a certain way. Abstraction is the representation of only the essential features of an object and hiding un essential features of an object. Through Abstraction all relevant data can be hide in order to reduce complexity and increase efficiency.

Abstraction is simplifying complex reality by modeling classes appropriate to the problem. Abstraction-outer layout, used in terms of design. Encapsulation protects abstraction. It taking required data and hiding the unwanted data.

In this above example abstraction shows only necessary details of car or shows only necessary details to drive a car like rear view mirror, gear, clutch, steering And hides internal detail of car like Piston, crankshaft, carburetors, gas turbines etc which is encapsulation for a car. Abstraction shows only required data and hides unwanted data.

Difference between Encapsulation and Abstraction 1. Abstraction solves the problem 1. Encapsulation solves the problem in the in the design level implementation level 2.

What is OOPS?

Abstraction is used for hiding the unwanted data and giving relevant data 3. Abstraction is a technique that helps to identify which specific information should be visible and which information should be hidden. Encapsulation means hiding the code and data in to a single unit to protect the data from outside world 3.

Encapsulation is the technique for packaging the information in such a way as to hide what should be hidden, and make visible what is intended to be visible. In this above example abstraction shows only necessary details of car or shows only necessary details to drive a car like rear view mirror, gear, clutch, steering And hides internal detail of car like Piston, crankshaft, carburetors, gas turbines etc which is encapsulation for a car Abstraction shows only required data and hides unwanted data.

In above example which shows encapsulated detail of a car which is not necessary to expose to outside world and make visible what is intended to be visible.

Encapsulation What is Encapsulation? Encapsulation is one of the fundamental principles of object-oriented programming. Encapsulation is a process of hiding all the internal details of an object from the outside world Encapsulation is the ability to hide its data and methods from outside the world and only expose data and methods that are required Encapsulation is a protective barrier that prevents the code and data being randomly accessed by other code or by outside the class Encapsulation gives us maintainability, flexibility and extensibility to our code.

Encapsulation makes implementation inaccessible to other parts of the program and protect from whatever actions might be taken outside the function or class. Encapsulation provides a way to protect data from accidental corruption Encapsulation hides information within an object Encapsulation is the technique or process of making the fields in a class private and providing access to the fields using public methods Encapsulation gives you the ability to validate the values before the object user change or obtain the value Encapsulation allows us to create a "black box" and protects an objects internal state from corruption by its clients.

Two ways to create a validation process. Inheritance, together with encapsulation and polymorphism, is one of the three primary characteristics concept of object-oriented programming Inheritance enables you to create new classes that reuse, extend, and modify the behavior that is defined in other classes The Class whose methods and variables are defined is called super class or base class The Class that inherits methods and variables are defined is called sub class or derived class Sometimes base class known as generalized class and derived class known as specialized class Keyword to declare inheritance is ":" colon in visual C.

Benefits of using Inheritance Once a behavior method or property is defined in a super class base class ,that behavior or property is automatically inherited by all subclasses derived class. Code reusability increased through inheritance Inheritance provide a clear model structure which is easy to understand without much complexity Using inheritance, classes become grouped together in a hierarchical tree structure Code are easy to manage and divided into parent and child classes Types of Inheritance in C : - Implementation Inheritance Multiple Inheritances Interface Inheritance Implementation Inheritance One base class super class and one derived class sub class.

Example: Interface Inheritance An interface looks like a class, but has no implementation. It contains definitions of events, indexers, methods and properties.

An interface inherited by classes An interface inheritance defined with keyword "interface". In C Interface Inheritance also known as multiple inheritances. An object is a software bundle of variables and related methods. Objects are related to real life scenario Class is the general thing and object is the specialization of general thing Objects are instance of classes.

Declaration of an Object in C.

Object Oriented Programming Concepts With a Systematic Approach to Write Better Code

What is an Attribute? Attributes define the characteristics of a class. The set of values of an attribute of a particular object is called its state.

In Class Program attribute can be a string or it can be a integer 2. What is a Behavior? Every object has behavior In C , behaviors of objects are written in methods. If a behavior of an object needs to be performed, then the corresponding method is called.

What is an Identity? Each time an object is created the object identity is been defined. This identity is usually created using an identifier which is derived from the type of item Difference Between Web Farm and Web Garden Introduction Web Farms and Web Garden are very common terminology for any production deployment.

Though these terms looks same but the things are totally different. Many beginners very confused with these two terms. Web Farm After developing our asp. Now one standalone server is sufficient to process ASP. NET Request and response for a small web sites but when the site comes for big organization where there an millions of daily user hits then we need to host the sites on multiple Server. This is called web farms.

Fig : General Web Farm Architecture This is the most common scenarios for any web based production environment. Which is the IP address of Load Balancer. When Load balancer received the request based on the server load it will redirect the request to particular Server. Builders will look at the blueprints and use those blueprints to make a physical house. They can use the same blueprint to make as many houses as they want Each house can accommodate it's own families The blueprint is the class The people living in the house are data stored in the object's properties.

Abstraction: Abstraction means showing essential features and hiding non-essential features to the user.

For Eg. Yahoo Mail When you provide the user name and password and click on submit button.. It will show Compose,Inbox,Outbox,Sentmails It just Opens Tv Remote..

In this OOPS concept, the variables of a class are always hidden from other classes. It can only be accessed using the methods of their current class.

For example - in school, a student cannot exist without a class. It defines the diversity between objects. In this OOP concept, all object have their separate lifecycle, and there is no owner. For example, many students can associate with one teacher while one student can also associate with multiple teachers. It is also called "death" relationship. Child objects do not have their lifecycle so when parent object deletes all child object will also delete automatically.

Any house can have several rooms. So, if you delete the house room will also be deleted. Objects created for Object-Oriented Programs can be reused in other programs. Thus it saves significant development cost. Large programs are difficult to write, but if the development and designing team follow OOPS concept then they can better design with minimum flaws.Object-Oriented Programming OOP uses a different set of programming languages than old procedural programming languages.

OOP Concepts in C#: Code Examples and How to Create a Class

Derived class: Child class Inheritance makes code elegant and less repetitive. Private Constructor Default Constructor : A constructor without any parameters is called as default constructor. We can use "new" keyword for creating objects. Microsoft almost had 3 to 4 API's for display technologies , so why a need for one more display technology.