声明空构造函数可阻止自动生成默认构造函数。注意，如果您不对构造函数使用访问修饰符，则在默认情况下它仍为私有构造函数。但是，通常显式地使用 private 修饰符来清楚地表明该类不能被实例化。

示例代码：

复制代码 代码如下:

public class PrivateConClass

{

private static PrivateConClass pcc;

private PrivateConClass()

{

Console.WriteLine("This private constructure function. So you cannot create an instance of this class.");

}

public static PrivateConClass CreatePcc()

{

pcc = new PrivateConClass();

return pcc;

}

public static void ShowStaticMethod()

{

Console.WriteLine("This is a static method. Just be called by Class name.");

}

public void ShowMethod()

{

Console.WriteLine("This is a Nonstatic method. Just be called by private static instance pcc.");

}

}

class Program

{

static void Main(string[] args)

{

PrivateConClass pcc = PrivateConClass.CreatePcc();

pcc.ShowMethod();

PrivateConClass.ShowStaticMethod();

}

}