使用“0”参数调用“删除”的异常：“字典中不存在给定的键
[英]Exception calling "Remove" with "0" argument(s): "The given key was not present in the dictionary
问题描述
I have added a migration using Add-Migration , Now If I run Remove-Migration , it reverts the migration and remove the generated migration file successfully, but gives the error in Package Manager Console also.
我已经使用Add-Migration添加了一个Add-Migration ，现在如果我运行Remove-Migration ，它会恢复迁移并成功删除生成的迁移文件，但也会在包管理器控制台中给出错误。 I could not figure out the exact reason behind it and side effect of it.我无法弄清楚其背后的确切原因及其副作用。 Is this EF Core bug?这是 EF Core 的错误吗？
Package Manager Output:包管理器输出：
PM> Remove-Migration Removing migration '20180320052521_testMigration'.
EF Core Version: 2.0.1 EF 核心版本： 2.0.1
2 个解决方案
解决方案1
0 2021-06-07 11:32:01
When you're adding or removing a migration, the application is build.当您添加或删除迁移时，应用程序正在构建。 So, most likely you have a collection where you're trying to remove an item with a wrong key and the compiler goes through that piece of code while removing the migration.所以，很可能你有一个集合，你试图删除一个带有错误键的项目，编译器在删除迁移时会遍历那段代码。
解决方案2
0 2021-11-30 14:38:31
The Application is always building when a migration is added to the Project as mentioned in the previous answers.如前面的答案中所述，将迁移添加到项目时，应用程序始终在构建。
This one is not actually a Solution, its more a workaround which is working for me at most.这实际上不是解决方案，它更像是一种最多对我有用的解决方法。
Try to remove your Migration mit following Command尝试按照命令删除您的迁移权限
Remove-Migration NameOfMigration
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