An Introduction to C# and .NET Framework (Basic)

An Introduction to C# and .NET Framework (Basic)

• 1.
  An Introduction toC# and the .NET Framework Powered by Khubaib Web Trainer at Ewiglife Cloud Technologies
• 2.
  Recursive Method Call A method can call itself.  Access Specifier  Return type  Method name  Parameter List  Method body
• 4.
  Recursive
• 5.
  Arrays  An arraystores a fixed-size sequential collection of elements of the same type.  Declaring Arrays  datatype[] arrayName;
• 6.
  Arrays Program
• 7.
  Isn’t?
• 8.
  Array program
• 9.
  Inheritance  One ofthe most important concepts  Inheritance allows us to define a class in terms of another class  makes it easier to create and maintain an application  Base and Derived Classes
• 10.
  Example
• 11.
  C++ logic In Cwe had to code our own bugs. In C++ we can inherit them.
• 12.
  C# - Polymorphism The word polymorphism means having many forms  'one interface, multiple functions'.  Static (In static polymorphism, the response to a function is determined at the compile time)  Dynamic(In dynamic polymorphism, it is decided at run-time.)
• 13.
  Static Polymorphism  C#provides two techniques to implement static polymorphism. Function overloading Operator overloading  Function Overloading  You can have multiple definitions for the same function name in the same scope
• 14.
  Example function overloading
• 15.
  Dynamic Polymorphism  C#allows you to create abstract classes that are used to provide partial class implementation of an interface  Abstract classes contain abstract methods  The derived classes have more specialized functionality.  rules about abstract classes  You cannot create an instance of an abstract class  You cannot declare an abstract method outside an abstract class  When a class is declared sealed, it cannot be inherited, abstract classes cannot be declared sealed.
• 16.
  Example
• 17.
  Polymorphism Fact  Adog, a spider, and a human can all walk at a rate of speed. Everyone knows this. But, when talking about the specifics of how they walk, each implementation is different. A spider has 8 legs and will 'scurry' around very quickly ( relative ). A dog has 4 legs and will leap and jump and run around. A human has 2 legs and will place one in front of the other, enabling them to walk.