C#: Access modifier make method invoke differently

Question

First of all, here is the code and the result is what expect:

code 1:

using System;

namespace ConsoleApplication11
{
    class DerivedClass : Base
    {
        public new void Run()
        {
            Console.WriteLine("Derived class");
        }
    }

    class Base
    {
        public void Run()
        {
            Console.WriteLine("Base class");
        }
       
        static void Main(string[] args)
        {
            DerivedClass dc = new DerivedClass();
            Base bc = new Base();

            dc.Run();
            bc.Run();
        }
    }
}

result 1:

Derived class

Base class

---

However, if I change both of two classes' Run() access modifiers frompublic to protected, thing became out of expect:

code 2:

using System;

namespace ConsoleApplication11
{
    class DerivedClass : Base
    {
        protected new void Run()
        {
            Console.WriteLine("Derived class");
        }
    }

    class Base
    {
        protected void Run()
        {
            Console.WriteLine("Base class");
        }
       
        static void Main(string[] args) 
        {
            DerivedClass dc = new DerivedClass();
            Base bc = new Base();

            dc.Run();
            bc.Run();
        }
    }
}

result 2:

Base class

Base class

My question is, under the circumstances that protected also allow the derived class to access the base class as public, Why does the result become different?

Answer 1

DerivedClass.Run is protected, so Base doesn't even see it. It invokes the Run method inherited from Base.