What is Abstract Class in C#?

Answer:

If we don't want a class to be instantiated, define the class as abstract. An abstract class can have abstract and non abstract classes. If a method is defined as abstract, it must be implemented in derived class. For example, in the classes given below, method DriveType is defined as abstract. 

abstract class Car
{
 public Car()
 {
  Console.WriteLine("Base Class Car");
 }
 public abstract void DriveType();
}
class Ford : Car
{
 public void DriveType()
 {
  Console.WriteLine("Right Hand ");
 }
}

Method DriveType get implemented in derived class.