C# console program - open to bidding

This is about writing programmes in C#: 1) Develop a console programme that reads an integer n from the console and outputs the Roman number string representing that integer. 2) For the purpose of this exercise, let a number be an abstract entity that allows addition, subtraction and multiplication. Numbers can be Roman numbers, hexadecimal numbers or binary numbers. Numbers can be read from the console, operated on and printed to the console. Use object oriented programming concepts to realise a suitable implementation. Also, develop a console programme to test your object implementations. I need good coding style (comments in your code, proper indentation, good structuring of the code, choosing appropriate C# types, good OO design, etc.) You are only expected to handle numbers from 0 to 65000.