C# 父类代码动态转换子类

百度上搜索C# 如何父类运行时转换成子类，没有得到相应答案，突然想起C# 有dynamic类型试试看结果成功了。。。

以后编写代码类似这样的代码 就可以删减掉了

if (en.type == EMapEntity.Construction)
            {    
                en.construction = new ConstructionPOD();
            }
            if (en.type == EMapEntity.Creature)
            {
                en.creature = new CreaturePOD();
            }

using System;
using System.Reflection;

class BaseOrm
{
    public int hp = 10;
}
class RoleOrm : BaseOrm
{
    public string name = "盘子脸";
}
class Program
{
    static void Main(string[] args)
    {
        string scriptName = "RoleOrm";
        Assembly a = Assembly.GetExecutingAssembly();
        Type t = a.GetType(scriptName, true);
        dynamic obj = Activator.CreateInstance(t);
        Console.WriteLine(obj.hp);
        Console.WriteLine(obj.name);
        RoleOrm r = obj;
        r.name = "plateface";
        Console.WriteLine(r.name);
        Console.ReadLine();
    }
}