有关C#的`List<> .ToString`的问题 [英] Question regarding C#'s `List<>.ToString`

问题描述

为什么C#List<>的ToString方法不提供明智的字符串表示形式来打印其内容?当我尝试打印List<>对象时，我得到了类名(我假设它是默认的object.ToString实现).为什么会这样?

Why doesn't C# List<>'s ToString method provide a sensible string representation that prints its contents? I get the class name (which I assume is the default object.ToString implementation) when I try to print a List<> object. Why is that so?

推荐答案

简单的答案是:恐怕就是这样.

The simple answer is: that's just the way it is, I'm afraid.

与List<T>类似，它不会覆盖GetHashCode或Equals.请注意，除了调用简单的ToString本身(可能用逗号分隔值)之外，它几乎没有其他令人愉悦的格式化方式.

Likewise List<T> doesn't override GetHashCode or Equals. Note that it would have very little way of formatting pleasantly other than to call the simple ToString itself, perhaps comma-separating the values.

如果愿意，您总是可以编写自己的扩展方法来执行适当的格式设置，或者使用string.Join的较新的重载使其变得非常简单:

You could always write your own extension method to perform appropriate formatting if you want, or use the newer overloads of string.Join which make it pretty simple:

string text = string.Join(",", list);

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