为什么我不能在初始化我我的结构领域？ [英] Why can't I initialize my fields in my structs?

问题描述

我很惊讶，我不能初始化我在结构领域，为什么会这样呢？这样的：

I am surprised that I can't initialize my fields in structs, why is it like that? Like:

struct MyStruct
{
    private int a = 90;
}

但它是一个complie时错误。我不知道为什么这是一个问题吗？请给我讲解一下。

but it's a complie time error. I don't know why it's a problem? Please explain this to me.

推荐答案

究其原因，主要是性能。考虑下面的，

The reason is mainly performance. Consider the following,

var a = new MyStruct[1000];

如果C＃允许在一个结构域的初始化则初始化将必须进行1000次，一次对于阵列中的每个元素。 C＃想避免这种类型的内隐行为可能会在其他语言中找到。

If C# allowed initialization of fields in a struct then the initialization would have to be performed 1000 times, once for each element in the array. C# wanted to avoid such kinds of implicit behavior as might be found in other languages.

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