A class that cannot be instantiated. A concept in C++ known as pure virtual method. A class that must be inherited and have the methods over-ridden. Essentially, it’s a blueprint for a class without any implementation.

The following is not possible:
      abstract class abProd
      {

      }

      public class Demo
      {
            public static void Main()
            {
                  abProd ab = new abProd();
            }
      }