Eu segui todos os passos, instalei o entity framework na versão 7, conferi a versão de tudo mas quando dou um Add-Migration SetDB aparece o seguinte erro
PM> Add-Migration SetDB
No migrations configuration type was found in the assembly 'LojaComEntity'. (In Visual Studio you can use the Enable-Migrations command from Package Manager Console to add a migrations configuration).Alguem sabe como resolver?
Tentei usar o Enable-Migrations e aparece isso
PM> Enable-Migrations
No context type was found in the assembly 'LojaComEntity'.