Inheritance

You will see encapsulation definiton and description with an example.

Logic of inheritance is same in the biology in terms of usage logic.Firstly,we created a BaseClass.This class can be called "Parent Class" for the other classes.In this phase u can not create an object because of OOP SOLiD rules.

For instance, in this picture "Person" is the Base Class for "Student" and "Staff".On the other hand , "Staff" class is the Parent Class for "Teacher" and "Cleaner".By using this body, u can give any properties to subclass like "Teacher" and "Cleaner".Let's look code behind;

public class BasePhone;
 public string Brand { get; set; }//Use prop + Tab + Tab
 public string Unitprice { get; set; }
 

Now we created a class which name is BasePhone.And now we will use inheritance for the SubClasses.

 public class iphone: BasePhone

We created a class which name is iphone and gives all properties and methods from BaseClass which name is "BasePhone" by using ":" and consequently we will create an object of this classes and we will see properties of "iPhone Class".

iphone iphone = new iphone();//Creating an object
iphone.Brand = "iphone ";//Calling from Baseparent
iphone.Model = "12 Pro Max";
iphone.Unitprice = "20.000";
MessageBox.Show($"id:{iphone.Id}\nBrand:{iphone.Brand}\nModel:{iphone.Model}\nUnitprice:{iphone.Unitprice}\nSeni:{iphone.Cal()}");

Virtual Usage in the Inheritance;

Override is a process that uses for changing a method on the Subclass (inherited from BaseClass).By using virtual,we will create a rule for subclass in terms of method knowledge,moreover,u can not skip subclass row without obey the rules that we created before.Therefore in the subclasses,all of them,should have different ability.

  public virtual string Cal()
    {
           return "Call ring tone of iPhone"; 
    }