CS0433: The type 'ASP.global_asax' exists in both 'c:\Windows\Microsoft.NET\Framework64\v4.0.30319\Temporary ASP.NET Files\root\88aaefaf\d7929c7f\assembly\dl3\f072c82d\00fd6cfe_1ea7d401\App_global.asax.DLL' and 'c:\Windows\Microsoft.NET\Framework64\v4.0.3。。。中
删除网站bin文件夹中的App_global.asax.DLL文件和App_global.asax.compiled两个文件即可解决