Use of Constructor in Abstract Class

Anand Jee

You can can't use constructor of Abstract Class directly as you can't create object of Abstract class.But you can achieve it using Derived class in this way

 

  abstract class AbsBaseClass
{
//A Non abstract method
public int AddTwoNumbers(int Num1, int Num2)
{
return Num1 + Num2;
}
public AbsBaseClass()
{
Console.WriteLine("I am in Abstract class Constructor ");
}
public abstract int MultiplyTwoNumbers(int Num1, int Num2);
}

//A Child Class of absClass
class DerivedClass:AbsBaseClass
{
public DerivedClass()
{
Console.WriteLine("I am in derived class Constructor ");
}
[STAThread]
static void Main(string[] args)
{
//AbsBaseClass obj = new AbsBaseClass(); //Error as we can't create object of Abstract class
DerivedClass calculate = new DerivedClass();
int added = calculate.AddTwoNumbers(10,20);
int multiplied = calculate.MultiplyTwoNumbers(10,20);
Console.WriteLine("Added : {0}, Multiplied : {1}", added, multiplied);
Console.ReadLine();
}
//using override keyword,implementing the abstract method
public override int MultiplyTwoNumbers(int Num1, int Num2)
{
return Num1 * Num2;
}
}

 

Accept all the answers that helps you.

Hope that helps.