c#反射-动态加载dll简单例子

假设已有组件ClassLibraryTEST.dll，放置于程序目录下。组件中ClassLibraryTEST命名空间下有TEST类，类中有方法sum。下面示例就是动态加载组件并调用sum方法的简例：

static void Main(string[] args)
        {
            string dllPath = string.Format("{0}\ClassLibraryTEST.dll", System.Environment.CurrentDirectory);//dll组件路径
            Assembly pAss = Assembly.LoadFile(dllPath);//加载组件
            Type pType = pAss.GetType("ClassLibraryTEST.TEST");//获得类，ClassLibraryTEST命名空间，TEST类名
            MethodInfo pMtInfo = pType.GetMethod("sum");//获得方法，sum方法名
            object o = Activator.CreateInstance(pType);//创建类实例
            int sum = (int)pMtInfo.Invoke(o, new object[] { 1, 2 });//调用方法
        }

下面是组件代码：

namespace ClassLibraryTEST
{
    public class TEST
    {
        private int a = 0;
        private int b = 0;
        public string s = "n";
        private int Add(int a,int b)
        {
            return a + b;
        }
        public int sum(int a, int b)
        {
            return a + b;
        }
        private string url = "www.123.com";
    }
}