受保护与受保护的内部(再次)在c#中

参见英文答案 > What is the difference between ‘protected’ and ‘protected internal’?????????????????????????????????????10个
我正在提出一个问题(再次)关于受保护的内容,因为我仍然不确定并且无法控制它们.

任何帮助深表感谢.

// DLL 1

namespace Assembly1
  {
    class class1 : class2
    {
      static void Main()
      {
         new class1().Test();
      }

      private void Test()
      {
         Console.WriteLine(this.sample);
      }
    }
 }

// DLL 2

namespace Assembly2
    {
        public class class2
        {
          // protected string sample = "Test";           
             protected internal string sample = "Test";

       //Same behavior when using protected and protected internal. Why ?

    }
}

我对这两行都有相同的行为.

// protected string sample = "Test";           
         protected internal string sample = "Test";

但我相信应该有一些区别.

MSDN says:
Protected: Access is limited to the containing class or types derived from the containing class.

Protected Internal: Access is limited to the current assembly or types derived from the containing class.

只要我从基类继承,我就可以从外部程序集访问受保护和受保护的内部.

很混乱！两者看起来完全相似.任何人都可以通过修改上面的例子来解释我吗？

// Assembly 1
class A {
    protected int foo;
    internal int bar;
    protected internal int baz;
}

class B : A {} // can access: foo,bar,baz
class C {} // can access: bar,baz

// Assembly 2
class D : A {} // can access: foo,baz
class E {} // can access neither