c# - Updating Entity Framework without Nuget from Vs2010 to Vs2015 -
just started working @ company planning on taking existing project , revamping it. project windows form built in c# , communicates app windows mobile 6.5, relays information app database management application. uses .net 4.0 entity framework 4.0. i going working on , first thing migrate project vs2010 vs2015; however, whenever try directly, have errors show references missing. have double checked .net targets projects in solution , match. i have tried going vs2010 vs2012 take step @ time; however, same errors show before. i have tried: setting targets each project in solution installing nuget, cannot find entity framework in porject package manager console, can never find version of entityframework when get-package typed package manager console, no packages installed returns installing manually, there no entityframework.dll in solution folders this project have entity framework system.data.entity included , looks of it, has entity framework api , calls. specific e