Visual Studio 2019升级MVC5提示The name 'ViewBag' does not exist in the current context错误信息的解决办吧
原来的项目是MVC4的，我就升级到MVC5但是可以编译，就是会提示ViewBag的错误信息如下图 在网上查找了一下，觉得应该是升级引起的，那么修改Web.config就应该没有问题了 首先是项目目录下的web.config中的版本号红色箭头处 下图中的版本是4.0.0.0 把这里修改为5.2.7.0 然后重新打开项目就ok了 下图是正常后的效果
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