受保护的构造函数-不与GetConstructors（）一起显示

Question

I have a class with a factory method and a protected constructor defined to take a few arguments.

public class MyClass
{
    protected void MyClass(int agr1, int arg2)
    {
      //set private backing fields for public readonly properties
    }

    public static MyClass From(int arg1, int arg2)
    {
          return new MyClass(arg1, arg2); 
    }
} 

Yet when I use typeof(MyClass).GetConstructors(BindingFlags.NonPublic) the array returned has zero items in it. Anyone see what I'm doing wrong?

Thanks

Answer 1

Since you are passing the BindingFlags yourself, you must not forget to include BindingFlags.Instance if necessary (which in this case, it is).

Including it will work:

var flags = BindingFlags.NonPublic | BindingFlags.Instance
var ctors = typeof(MyClass).GetConstructors(flags);

See it in action .