在净私人VS静态构造函数 [英] Private vs Static constructors in .Net

问题描述

我搜索了这个有很多，但没有一个答案是明确的（AT-至少对我来说！）。现在，我把这个问题的SO，我相信我能不能得到一个更明确的答案其他地方。

I searched for this a lot, but none of the answers are clear (at-least for me!). Now I'm putting this question in SO, as I believe I can't get a more clarified answer anywhere else.

当我应该使用私有/静态构造函数在我的课？

When should I use a private/static constructor in my class?

我受够了通常的答案，所以请帮助我，用这些构造的一些实时的例子和优势/劣势。

I'm fed up of usual answers, so please help me with some real-time examples and advantages/disadvantages of using these constructors.

推荐答案

静态构造函数：用于初始化静态成员

Static constructors: used for initialising static members.

私有构造函数：使用时，您只需要一个类从在自己的code（通常以一个静态方法）实例化。例如：

Private constructors: used when you only want a class to be instantiated from within its own code (typically in a static method). For example:

public class Thing
{
    static int Number;

    static Thing()
    {
        Number = 42; // This will only be called once, no matter how many instances of the class are created
    }

    // This method is the only means for external code to get a new Thing
    public static Thing GetNewThing()
    {
        return new Thing();
    }

    // This constructor can only be called from within the class.
    private Thing()
    {
    }
}

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