c# - Enable Migrations EF 6 Package Not Installed -

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i'm creating new mvc 5 solution using ef 6 code first membership. broke out solution 3 projects, 1 consisting of main project views, 1 core, or business layer, , third domain. datacontext , initializer classes in project called 'core'. when try use package manager console enable-migrations , select 'core' project default, get: not sure understand issue, have referenced entity framework libraries within project.

any idea doing wrong? tia

the answer nuget install of ef package vs. referencing dlls.


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