using System;
using System.Reflection;

namespace Dxy.ReflectionTest
{
/// <summary>
/// 反射帮助类
/// </summary>
    public static class ReflectionHelper
    {
/// <summary>
/// 创建对象实例
/// </summary>
/// <typeparam name="T">要创建对象的类型</typeparam>
/// <param name="assemblyName">类型所在程序集名称</param>
/// <param name="nameSpace">类型所在命名空间</param>
/// <param name="className">类型名</param>
/// <returns></returns>
        public static T CreateInstance<T>(string assemblyName,string nameSpace, string className)
        {
try
            {
string fullName = nameSpace + "." + className;//命名空间.类型名
//此为第一种写法
                object ect = Assembly.Load(assemblyName).CreateInstance(fullName);//加载程序集，创建程序集里面的 命名空间.类型名 实例
                return (T)ect;//类型转换并返回
//下面是第二种写法
//string path = fullName + "," + assemblyName;//命名空间.类型名,程序集
//Type o = Type.GetType(path);//加载类型
//object obj = Activator.CreateInstance(o, true);//根据类型创建实例
//return (T)obj;//类型转换并返回
            }
catch
            {
//发生异常，返回类型的默认值
                return default(T);
            }
        }
    }
}

using System;

namespace Dxy.ReflectionTest
{
class Program
    {
static void Main(string[] args)
        {
            ITest test = ReflectionHelper.CreateInstance<ITest>("ReflectionTest", "Dxy.ReflectionTest", "Test");
            Console.WriteLine(test.Name);
            Console.ReadLine();
        }
    }
}