Types of Inheritance in c#

Single Inheritance - Derived class is created from a single base class. SUPPORTED

Multi-level inheritance - Derived class is created from another derived class. SUPPORTED

Multiple inheritance - A derived class is created from more than one base class. NOT SUPPORTED

Multipath inheritance - In this inheritance, a derived class is created from multiple derived classes and each of these derived classes have same base class. NOT SUPPORTED

Hierarchial inheritance - In this inheritance, more than one derived classes are created from a single base. SUPPORTED

Hybrid inheritance - This is combination of more than one inheritance. So depending on type of combination we can say SUPPORTEDor NOT SUPPORTED

Understanding Runtime Polymorphism

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ConsoleApps

{

    class BaseClass

    {

        public void Normal()

        {

            Console.WriteLine("Base Class print");

        }

        public virtual void RuntimePoly()

        {

            Console.WriteLine("Base Class print");

        }

    }

    class DerivedClass : BaseClass

    {

        public new void Normal()

        {

            Console.WriteLine("Derived Class print");

        }

        public override void RuntimePoly()

        {

            Console.WriteLine("Derived Class print");

        }

    }

class UnderstandingRuntimePolymorphism

{

 public static void Main()

{

           // Here Base class method is called

           BaseClass nm = new DerivedClass();

           nm.Normal();

          // Here Derived class method is called

            // Due to run time decision (late binding or runtime polymorphism)

            // since the methods are overriden with ovveride keyword in derived class

            // and virtual keyword in base class of the methods

           BaseClass poly = new DerivedClass();

           poly.RuntimePoly();

     }

 }

}

Understanding Inheritance Concept in C#

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Apps

{

    class Doctor

    {

        protected string name, specialization;

        public Doctor(string name, string specialization)

        {

            this.name = name;

            this.specialization = specialization;

        }

        public void Print()

        {

            Console.WriteLine(name);

            Console.WriteLine(specialization);

        }

    }

    class ResidentalDoctors : Doctor

    {

        protected int salary;

        public ResidentalDoctors(string name, string specialization, int salary)

            : base(name, specialization)

        {

            this.salary = salary;

        }

        public new void Print()

        {

            base.Print();

            Console.WriteLine(salary);

        }

        public int GetPay()

        {

            return salary;

        }

    }

    class Consultant : Doctor

    {

        protected int fees, visitNum;

        public Consultant(string name, string specialization, int fees, int visitNum)

            : base(name, specialization)

        {

            this.fees = fees;

            this.visitNum = visitNum;

        }

        public new void Print()

        {

            base.Print();

            Console.WriteLine(fees);

            Console.WriteLine(visitNum);

        }

        public int GetPay()

        {

            return fees * visitNum;

        }

    }

    class UnderstandingInheritanceConcept

    {

        public static void Main()

        {

            ResidentalDoctors rd = new ResidentalDoctors("Steve", "General", 100);

            Consultant c = new Consultant("Chitti", "General", 300, 10);

            Console.WriteLine(rd.GetPay());

            Console.WriteLine(c.GetPay());

            rd.Print();

            c.Print();

        }

    }

}