Could not load assembly 'EntityFramework, Version=6.0.0.0

Question

i am using two projects in one solution, One project for DataBase Operations in which i use Entityfamework. But When i save data then its showing error Could not load file or assembly 'EntityFramework, Version=6.0.0.0,

 

My Controller

 

Another Project class

 

Main Project Web.config class

 

Another project config class