C#反射 程序域

1：加载dll到当前应用程序域：

public static void LoadAllAssembly(string bindir) //bindir是dll所在的完整路径       

{            
    List<Assembly> _lst = new List<Assembly>(AppDomain.CurrentDomain.GetAssemblies());  
    List<string> filelist = new List<string>(System.IO.Directory.GetFiles(bindir, "*.dll"));  
    //filelist.AddRange(System.IO.Directory.GetFiles(bindir, "*.exe")); //如果需要也加载exe的话，取消注释 
    for (int i = 0; i < filelist.Count; i++)            
    {                
        string f = filelist[i];               
        f = Path.GetFileName(f).ToLower();               
        if (f.StartsWith("interop.") || f.Contains(".vshost.exe")) 
            continue;                
        if (!f.EndsWith(".dll") && !f.EndsWith(".exe"))
            continue;
        try
        {
            if (!CheckAssemblyLoaded(_lst, filelist[i]))
                _lst.Add(Assembly.LoadFrom(filelist[i]));
        }               
        catch (Exception ex)                
        {                   
            Console.WriteLine("[" + DateTime.Now.ToShortTimeString() + "] " + ex.Message); 
            //ErrorMessage.ErrorMessage.Show(ex);               
        }            
    }        
}

        private static bool CheckAssemblyLoaded(List<Assembly> list, string filename)
        {
            if (string.IsNullOrEmpty(filename) || list == null || list.Count == 0)
                return false;
            try
            {
                filename = filename.ToLower();
                for (int i = 0; i < list.Count; i++)
                {
                    if (Path.GetFileName(list[i].Location).ToLower() == filename)
                        return true;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("[" + DateTime.Now.ToShortTimeString() + "] " + ex.Message);                
                return false;
            }            
            return false;
        }

2：根据类的全名遍历所有appdomain中的程序集，取得相应的类型

      private static Dictionary<string, Type> _typeList = new Dictionary<string, Type>();

        /// <summary> 
        /// 根据类的全面获取类型，将在当前AppDomain中的所有加载的程序集中查找       
        /// </summary>       
        ///  <param name="fullname">类型的Fullname</param>        
        /// <returns>类型，若不存在返回null</returns>       

        public static Type GetType(string fullname)
        {
            if (fullname == null)                
                return null;            
            if (_typeList.ContainsKey(fullname))                
                return _typeList[fullname];
            if (!string.IsNullOrEmpty(fullname))
            {
                Assembly[] a = AppDomain.CurrentDomain.GetAssemblies();
                for (int i = 0; i < a.Length; i++)
                {
                    Type t = a[i].GetType(fullname);
                    if (t != null)
                    {
                        _typeList.Add(fullname, t);                        
                        return t;
                    }
                }
            }            
            return null;
        }