C#: Creating an instance of an abstract class without defining new class

Question

I know it can be done in Java, as I have used this technique quite extensively in the past. An example in Java would be shown below. (Additional question. What is this techn

Answer 1

Since your class represents only an action, you can use a delegate in your case, there is an existing delegate :

public delegate void Action();

This is the exact equivalent of your class.

And the déclaration of your anonymous class is even cleaner :

Action action = () => Console.WriteLine("Hello world");
action(); // invoke

you can even use closure :

public void Hello(string name)
{
  Action action = () => Console.WriteLine("Hello " + name);
  action(); // will call the above lambda !
}