C# 多重overide

using UnityEngine;
using System.Collections;

class CBase
{
    public virtual void PrintName ()
    {
        Debug.Log ("CBase-----");
    }

    public void test ()
    {
        Debug.Log ("CBase-test-----");
    }
}

class CSon:CBase
{
    public override void PrintName ()
    {
        Debug.Log ("CSon-----");
    }

    public new void test ()
    {
        Debug.Log ("CSon-test-----");
        
    }
}

class CGrandSon1:CSon
{
    public void PrintName ()
    {
        Debug.Log ("CGrandSon1-----");
    }

    public new void test ()
    {
        Debug.Log ("CGrandSon1-test-----");
    }
}

class CGrandSon2:CSon
{
    public override void PrintName ()
    {
        Debug.Log ("CGrandSon2-----");
    }
}

public class testVirtualFunc : MonoBehaviour
{
    
    // Use this for initialization
    void Start ()
    {
        CSon os1 = new CGrandSon1 ();
        os1.PrintName (); //CSon-----
        os1.test ();    //CSon-test-----
        CSon os2 = new CGrandSon2 ();
        os2.PrintName (); //CGrandSon2-----
    }
    
    // Update is called once per frame
    void Update ()
    {
    
    }
}