Casting vs将对象转换为toString，当对象真的是字符串时

问题描述

这不是一个问题，但我很好奇。当我保存一个字符串让我们说一个DataRow，它被转换为Object。当我想使用它，我不得不把它ToString。据我所知，有几种方法这样做，首先是

This isn't really an issue, however I am curious. When I save a string in lets say an DataRow, it is cast to Object. When I want to use it, I have to cast it ToString. As far as I know there are several ways of doing this, first is

string name = (string)DataRowObject["name"]; //valid since I know it's a string

，另一个是：

string name = DataRowObject["name"].ToString();

我感兴趣的是两者之间有什么区别？第一个更高效？ （这只是一个猜测，在我的头ToString（）方法是通过一些循环机制实现，只是投射它可以更快，但这只是一个直觉）。

I am interested in what is the difference between both? Is the first more efficient? (This is just a speculation, in my head ToString() method is implemented by some looping mechanism where just casting it "could" be faster, however this is just a "gut feeling" I have).

有更快/更优雅的方法吗？

Is there even a faster / more elegant way of doing this?

任何人都可以为我清除这个？

Can anyone clear this up for me?

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