C# Inheritance

C# Inheritance

Inheritance in C# is an OOP concept that allows a class (derived/child class) to reuse properties and methods of another class (base/parent class).
It promotes code reusability and hierarchical relationships.

🔹 Syntax

• : symbol is used to indicate inheritance.

🔹 Simple Example

🔹 Types of Inheritance in C#

1. Single Inheritance – One child inherits one parent

2. Multilevel Inheritance – Chain of inheritance

3. Hierarchical Inheritance – Multiple children inherit one parent

C# does not support multiple class inheritance (Child cannot inherit from multiple classes)
Use interfaces for multiple inheritance.

🔹 Access Modifiers in Inheritance

🔹 Using base Keyword

Access base class members:

🔹 Method Overriding

• Use virtual in base class

• Use override in derived class

🔹 Sealed Classes

• Prevents a class from being inherited

🔹 Common Mistakes

❌ Trying multiple class inheritance
❌ Accessing private base members
❌ Forgetting virtual for overriding

🔹 Summary

✔ Derived classes inherit base class members
✔ Promotes code reusability
✔ base keyword accesses parent members
✔ Use virtual and override for polymorphism
✔ C# allows single, multilevel, hierarchical inheritance