C Sharp Object Oriented Programming Tutorial Videos for Beginner

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C Object Oriented programming Tutorial Videos
for Beginners by
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Highlights

• Introduction Pillars of OOP
• Inheritance
• Polymorphism
• Abstract Classes
• Interfaces

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Introduction Pillars of OOP

• Object oriented programming is used to combine
  data and the methods.
• C OOPS includes encapsulation, inheritance, and
  polymorphism and Abstraction.
• Encapsulation is a collection of related
  properties and methods.
• Inheritance uses to create new classes based on
  existing classes.
• Polymorphism defines multiple classes can
  implements the same properties or methods in
  different ways.
• Abstraction represents essential features without
  revealing the background details.

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Inheritance

• Inheritance is a process of object reusability.
• Enables creating a new class by extending another
  class.
• Inherited class are called base class and class
  that inherits other classes is called derived
  class.
• Multiple inheritance can not possible in C.
• public sealed class A is the syntax to
  specify class that cant be use as base.

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Polymorphism

• polymorphism means having several forms.
• Expresses as one interface, multiple functions.
• Basically it is two types, one is static, another
  one is dynamic polymorphism.
• Static polymorphism responses to a function is
  determined at the compile time.
• Dynamic polymorphism would be decided at
  run-time.

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Abstract Classes

• This classes are also called as incomplete
  classes.
• In abstract classes only objects would be
  declared.
• Implementation or usage of abstract classes will
  be done in derived classes.
• Contains one or more abstract methods.
• Purpose is to give a common definition for a base
  class that multiple derived classes can share. 
• Abstract classes can not be instantiated and
  methods can not be implemented.

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Interfaces

• It is a collection of abstract methods.
• Interfaces appear similar as like classes.
• Classes implements interfaces by inheriting
  abstract methods of t.
• Includes signatures of properties, events,
  methods or indexers.
• interfaces can inherit from one or more base
  interfaces.
• Interfaces can not be instantiated and does not
  allow any constructors.

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