如何防止在访问C＃中的成员函数时调用一个类的构造函数？(How to prevent calling constructor of one class while having access to its member functions in C#?)

 我有一个类A和一个类AStore 。 我的要求是阻止所有其他方法初始化A类的实例，他们应该从AStore获取一个实例。 另外，我还需要从实例中访问A的成员函数。 
 
 A的构造函数仍然是公共的，工厂模式不适合这个问题。 理想情况下，在访问其成员函数时调用类A的构造函数时，应该抛出编译错误。 
 
 我可以获得C＃解决方案吗？ 

I have a class A, and a class AStore. My requirement is to prevent all other methods from initializing an instance of class A, which they should get an instance from AStore. In addition, I also need to access the member functions of A from the instance.
 
Factory pattern is not suitable for this problem as the constructor of A is still public. Ideally, it should throw compilation error when calling the constructor of class A while having access to its member functions.
 
Can I get C# solutions to this?

原文：https://stackoverflow.com/questions/41984648