接口编程,反射创建对象

using System;
using System.Collections.Generic;
using System.Text;

namespace ABC.Factory
{
    public class BLLFactory
    {
        /// <summary>
        /// 创建实例
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="TypeName"></param>
        /// <returns></returns>
        public static T CreateInstant<T>(string TypeName)
        {
            T ret = default(T);
            try
            {
                string dd = typeof(string).ToString();
                string FullTypeName = "ABC.BLL." + TypeName;
                Type type = Type.GetType(FullTypeName);
                object obj = Activator.CreateInstance(type);
                ret = (T)obj;
                return ret;
            }
            catch
            {
                return ret;
            }
        }

        /// <summary>
        /// 创建实例
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="TypeName"></param>
        /// <param name="Args">构造函数的参数</param>
        /// <returns></returns>
        public static T CreateInstant<T>(string TypeName,object[] Args)
        {
            T ret = default(T);
            try
            {
                string dd = typeof(string).ToString();
                string FullTypeName = "ABC.BLL." + TypeName;
                Type type = Type.GetType(FullTypeName);
                object obj = Activator.CreateInstance(type, Args);
                ret = (T)obj;
                return ret;
            }
            catch
            {
                return ret;
            }
        }
    }
}

         //接口编程,反射创建对象
         // 类库IBLL里定义有接口ICXbll ，
        // 类库 BLL里定义有类CXbll 。类FPCXbll实现接口ICXbll
        // 为使得能够在只引用接口库IBLL而不引用类库 BLL的条件下创建类 BLL.CXbll

IBLL.ICXbll cxBLL = Factory.BLLFactory.CreateInstant<IBLL.ICXbll>("CXbll");

BLL.CXbll cxBLL = new ABC.BLL.CXbll();