工厂模式，返回实例为Null

Question

private static readonly string AssemblyPath=ConfigurationManager.AppSettings["DAL"];
 public static ERPSys.IDAL.IAdmin CreateAdmin() 

 {            

          string ClassNamespace = AssemblyPath ".Admin";

           IDAL.IAdmin admin=ERPSys.IDAL.IAdmin)Assembly.Load(AssemblyPath).CreateInstance(ClassNamespace));            return admin; 

}

Answer 1

反射不成功Assembly.Load(AssemblyPath).CreateInstance检查assemblypath是否存在，这个asebmlby是否部署，然后查看ClassNamespace是否在该dll中包含