1. in c#
readonly can be delayed to initialize in constructor.
2. in c++
totally no readonly.
Many people have mastered c++ before c#. They are the managers.
So many of the interview are about the difference of c# and c++.
I am always confused about the interview problems since I never use it before.
Such as readonly. In c#, there are no pointer, we don‘t need const and readonly actually.
All you need to do is set a All caps up variable name as a field. such as:
class A
{
double MYPI=0.7;
}
I am sure none will try to change it in the methods. The same for static. Only one way I will use static:
when I need to use a static method. That is all. Please forget the differece of static readonly and const.
We don‘t need it totally.
When I interviewed with Microsoft one year ago.
I am aware of that, the most important things of c# are all in Effective C#.
If you understand all items, you understand how to use c#.
Readonly and other things about C++
原文：http://www.cnblogs.com/gaoxianzhi/p/4423580.html