关于MVC 中Build failed问题的解决

出现了如图的情况

解决方法

第一步

删除图中的Migrations目录下的所有文件

 

第二步

删除这个包，再重新装上！！

 

PM> add-migration Intial_one
Build started...
Build failed.
PM> add-migration Intial_one
Build started...
Build failed.
PM> add-migration Intial_one
Build started...
Build failed.
PM> add-migration IntialCreate
Build started...
Build failed.
PM> 
PM> 
PM> 
PM> 
PM> add-migration IntialCreate
Build started...
Build succeeded.
Microsoft.EntityFrameworkCore.Infrastructure[10403]
      Entity Framework Core 6.0.2 initialized 'POKEMMONContext' using provider 'Microsoft.EntityFrameworkCore.SqlServer:6.0.2' with options: None
To undo this action, use Remove-Migration.
PM> add-

OK没有了