I\'m using this MSDN Tutorial to run in VS2015 the command PM> Add-Migration MyFirstMigration -context BloggingContext that ran yesterday successfully but to
Try the following steps:
1) Open project.json file and Remove all Microsoft.EntityFrameworkCore.Tools references from dependencies and tools sections.
2) Close Package Manager Console (PMC) and restart Visual Studio
3) Add under dependencies section:
"Microsoft.EntityFrameworkCore.Tools": {
"version": "1.0.0-preview2-final",
"type": "build"
}
4) Add under tools section
"Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final"
5) Restart again Visual Studio 2015
6) Open the PMC and type
Add-Migration $Your_First_Migration_Name$
This happen because the PMC recognize the tools when Visual Studio is starting.