 |
| inheritance in c# |
“The mechanism
of creating relation between classes by declaring parent and child relationship
to consume or to inherited the member of parent class in child class.”
Usually we build
inheritance when the need arise to call class member of any other into our defining
class. Then our class will be child and the other will parent. Parent class is
also known as super class or base class, and child class also known as sub
class.
When we instantiate the child class
then we will able to access the parent class due to create of inheritance link between
these classes. Once we created inheritance between other class with our define
class we are able to access the member of other class in our program.
SYNTAX
Public class
child : parent
Or
Public class
parent
{
Members;
}
Public class
child : parent
{
Members;
}
POINTS TO BUILD INHERITANCE
1. For performing inheritance the parent class constructor must be public
or default means the parent class constructor should accessible to the child
class otherwise inheritance will not possible. If we define the parent class
constructor as private then error will show. Because the child class implicitly
call the parent class constructor when its instantiated. But the child class constructor
needs not to be public at all if not needed.
2. Parent class can never access child class member only child
class can access its parent class.
3. By creating child class instance we can initialize parent class
variable.by making child class as reference. When the reference built the
parent class consumes the memory of child class.
4. If we have only one class in our program and we does not create
any inheritance then our class will have a parent class by default that is
object class which define in our system namespace.
5. In C –Sharp (C#) it don’t support multiple inheritance through
classes. Only perform single and multi-level inheritance.
6. Referring point 1. If the parent class constructor is parametric
then we have to call it explicitly, that means it is the responsibility of the
programmer to pass the value by using keyword ‘base’ from the constructor of
the child class. Otherwise the child class can’t able to call parent class
constructor. Like this
Public
class child (int a) : (base (a))
TYPE OF INHERITANCE
Actually on
the base of C++ we have five type of inheritance which are follow as
a. Single Inheritance
b. Multi-level Inheritance
c. Hierarchical Inheritance
d. Hybrid Inheritance
e. Multiple Inheritance
But we only discussed about single, multi-level
and multiply inheritance in C#.
SINGLE INHERITANCE
The mechanism
of creating only one immediate parent class
and it has only one parent and one child that perform inheritance mechanism is
called single inheritance.
 |
| c# single inheritance |
SYNTAX
Public class parent
{
Members;
}
Public class
child : parent
{
Members;
}
MULTI-LEVEL INHERITANCE
The second
type of inheritance in which we create one immediate parent class but it may
consist of more than one parent and one child class.
 |
| c# multilevel inheritance |
SYNTAX
Public class parent
{
Members;
}
Public class
child 1 : parent
{
Members;
}
Public class child 2 : child 1
{
Members;
}
MULTIPLE INHERITANCES
The type of
inheritance that performing by creating one child having multiple parents means
more than one immediate parent class to child.
Normally it is not allowed in c# but we can do it by adding
additional keywords by using interfaces. Referring point 6.
 |
| c# multiple inheritance |
SYNTAX
Public class parent 1
{
Members;
}
Public class
parent 2
{
Members;
}
Public class child : parent1 : parent 2
{
Members;
}
SIBLING CLASS
“If two or more than two classes have same parent class then
the classes will be sibling class”. Like brother sister in real that have same
parents.
 |
| C# sibling class |
SYNTAX
Public class parent
{
Members;
}
Public class
child 1 : parent
{
Members;
}
Public class child 2 : parent
{
Members;
}
see examples: GO
0 comments:
Post a Comment
Please do not enter any spam link in the comment box