Why can't I create an abstract constructor on an abstract C# class?

Question

I am creating an abstract class. I want each of my derived classes to be forced to implement a specific signature of constructor. As such, I did what I would have done has I

Answer 1

hope this will help someone newb as i am i was looking to make a "normal" public class with a ctor that takes argument and then i needed to make it a child class so i needed an empty ctor for it.

i didnt know this before: if you make a protected ctor then the child class sees it but the rest of the program dont see it (i guess my confusion is since in asp.net i see all the protected in the aspx page which inherits from the cs...)