[EFCore] How to migration?

[alfadb]

In EF7, we can use 'dnx ef migrations add xx'.
But in EF Core, I get a message: 'Microsoft.EntityFrameworkCore.Commands' does not contain a 'Program' type suitable for an entry point

[bricelam]

The nightly builds are transitioning to the .NET Core CLI. DNX will no longer work. I recommend using RC1 until RC2 is released.

[rowanmiller]

Work is already tracked by #3925

[alfadb]

Thanks!