Static Class Attributes and Inheritance

Transcript

1. Static Class Attributes RAM SAPKOTA
2. Static Class Attribute  Static Class attribute is an attribute about the class not about the specific objects of the class.  A static property is accessed not with instance name but after class name it self.  We will demonstrate it with a example  First lets make a class of student with needed properties, and make a constructor.  Now let’s add static attribute as below:
3. Continue….  Now, lets initialize static class in our constructor as below:  Now let’s initialize and use this class as below in our main method.  Finally, you can see that the cunt increases as we create new class
4. Static Methods & Classes  As of attribute Static Methods are the methods of the class not method of instances.  To create a static method just add static keyword in the method.  Static method is directly accesses like static attribute.  Static Class is a class of which we cannot create new instances.]  They are extremely useful.  Normally, static classes are used to include useful methods.  For Eg: Math is a static class and we cannot create instance of Math class.
5. Let’s demonstrate with example.
6. Inheritance  Inheritance in C# is a technique by which we can inherit all the properties and functions of one class to another.  Suppose we have a Person class with methods like Walks(), Sleeps() and Eat().  Now let’s make a student class, and we know that a student is also a person. Here Inheritance comes in to hand.  We can inherit properties and methods of Person class to Student Class by which Student class can access methods like Walks(), Sleeps()  To inherit we just use : after the Student class and write Person.  Similarly, we con override some methods of Person class also.  To do this just add virtual keyword to the required method.  Now in Student class just use override for that same method and you can now change the property of Person class.