Use of abstract class

Hi Alok,

An abstract class cannot be instantiated as an object and is only provided for the purpose of deriving subclasses. a base class is not intended to be instantiated and is provided solely for the purpose of providing an outline for subclasses.

for e.g:-

abstract class absClass1
{
    public abstract int AddTwoNumbers(int Num1, int Num2);
    public abstract int MultiplyTwoNumbers(int Num1, int Num2);
}

abstract class absClass2:absClass1
{
    //Implementing AddTwoNumbers
    public override int AddTwoNumbers(int Num1, int Num2)
    {
        return Num1+Num2;
    }
}

Thanks,
Pravin