Server Error in '/' Application.
Could not load file or assembly 'App_Code' or one of its dependencies. This assembly is built by a runtime newer than the currently loaded runtime and cannot be loaded.
未能加载文件或程序集“App_Code”或它的某一个依赖项。另一个程序正在使用此文件,进程无法访问。
发布网站后打开网站出现这个问题,该怎么办呢,求答案,谢谢了