Build error in TF build definition

Question

I have written a project using entity framework which is building and working fine locally. But if I try and run automated build using VSTS I get an error when I run the build definition. I think it's happening because of entity framework reference but I'm not sure of the root cause. Here's the error reference:

2016-12-08T07:42:52.1197143Z ##[error]MyMovieDatabase\Movies.Repository\MovieContext.cs(4,19): Error CS0234: The type or namespace name 'Entity' does not exist in the namespace 'System.Data' (are you missing an assembly reference?)
2016-12-08T07:42:52.1197143Z MovieContext.cs(4,19): error CS0234: The type or namespace name 'Entity' does not exist in the namespace 'System.Data' (are you missing an assembly reference?) [C:\a\1\s\MyMovieDatabase\Movies.Repository\Movies.Repository.csproj]
2016-12-08T07:42:52.1197143Z ##[error]MyMovieDatabase\Movies.Repository\MovieContext.cs(5,19): Error CS0234: The type or namespace name 'Entity' does not exist in the namespace 'System.Data' (are you missing an assembly reference?)
2016-12-08T07:42:52.1197143Z MovieContext.cs(5,19): error CS0234: The type or namespace name 'Entity' does not exist in the namespace 'System.Data' (are you missing an assembly reference?) [C:\a\1\s\MyMovieDatabase\Movies.Repository\Movies.Repository.csproj]
2016-12-08T07:42:52.1197143Z ##[error]MyMovieDatabase\Movies.Repository\MovieContext.cs(7,29): Error CS0246: The type or namespace name 'DbContext' could not be found (are you missing a using directive or an assembly reference?)
2016-12-08T07:42:52.1197143Z MovieContext.cs(7,29): error CS0246: The type or namespace name 'DbContext' could not be found (are you missing a using directive or an assembly reference?) [C:\a\1\s\MyMovieDatabase\Movies.Repository\Movies.Repository.csproj]
2016-12-08T07:42:52.1197143Z ##[error]MyMovieDatabase\Movies.Repository\MovieContext.cs(17,33): Error CS0246: The type or namespace name 'CreateDatabaseIfNotExists' could not be found (are you missing a using directive or an assembly reference?)
2016-12-08T07:42:52.1197143Z MovieContext.cs(17,33): error CS0246: The type or namespace name 'CreateDatabaseIfNotExists' could not be found (are you missing a using directive or an assembly reference?) [C:\a\1\s\MyMovieDatabase\Movies.Repository\Movies.Repository.csproj]
2016-12-08T07:42:52.1197143Z ##[error]MyMovieDatabase\Movies.Repository\MovieContext.cs(40,35): Error CS0246: The type or namespace name 'DbConfiguration' could not be found (are you missing a using directive or an assembly reference?)
2016-12-08T07:42:52.1197143Z MovieContext.cs(40,35): error CS0246: The type or namespace name 'DbConfiguration' could not be found (are you missing a using directive or an assembly reference?) [C:\a\1\s\MyMovieDatabase\Movies.Repository\Movies.Repository.csproj]
2016-12-08T07:42:52.1197143Z ##[error]MyMovieDatabase\Movies.Repository\MovieRepository.cs(3,19): Error CS0234: The type or namespace name 'Entity' does not exist in the namespace 'System.Data' (are you missing an assembly reference?)
2016-12-08T07:42:52.1197143Z MovieRepository.cs(3,19): error CS0234: The type or namespace name 'Entity' does not exist in the namespace 'System.Data' (are you missing an assembly reference?) [C:\a\1\s\MyMovieDatabase\Movies.Repository\Movies.Repository.csproj]
2016-12-08T07:42:52.1197143Z ##[error]MyMovieDatabase\Movies.Repository\MovieContext.cs(14,12): Error CS0246: The type or namespace name 'DbSet' could not be found (are you missing a using directive or an assembly reference?)

//Here's the Movies.Repository.csproj which refer the entity framework dlls:

` <ItemGroup> <Reference Include="EntityFramework"> <HintPath>..\packages\EntityFramework.6.1.1\lib\net45\EntityFramework.dll</HintPath> </Reference> <Reference Include="EntityFramework.SqlServer"> <HintPath>..\packages\EntityFramework.6.1.1\lib\net45\EntityFramework.SqlServer.dll</HintPath> </Reference>`

Answer 1

I think the problem is in your reference i.e. .csproject which is using local reference(from you packages directory in hard disk). This will not work if you deploy it on a server. Change it to your nigetpackages path. Also change the hint path for all the references in the format given below.

$(NugetPackagesPath)\EntityFramework.6.1.1\lib\net45\Entity‌​Framework.dll

To get the NugetPackgesPath:

<PropertyGroup>
    <!-- EnlistmentRoot is the base directory where all of the module root directories reside. --> 
    <EnlistmentRoot>$(MSBuildThisFileDirectory)</EnlistmentRoot>
    <EnlistmentRoot Condition="'$(EnlistmentRoot)' != ''">$([System.IO.Path]::GetFullPath('$(EnlistmentRoot)'))</EnlistmentRoot>
    <EnlistmentRoot Condition="'$(EnlistmentRoot)' != '' and !HasTrailingSlash('$(EnlistmentRoot)')">$(EnlistmentRoot)\</EnlistmentRoot>
</PropertyGroup>
<PropertyGroup>
    <!-- NuGetPackagesPath is the base directory for all nuget packages. --> 
    <NuGetPackagesPath>$(EnlistmentRoot)Ref\Packages</NuGetPackagesPath>
    <NuGetPackagesPath Condition="'$(NuGetPackagesPath)' != ''">$([System.IO.Path]::GetFullPath('$(NuGetPackagesPath)'))</NuGetPackagesPath>
    <NuGetPackagesPath Condition="'$(NuGetPackagesPath)' != '' and !HasTrailingSlash('$(NuGetPackagesPath)')">$(NuGetPackagesPath)\</NuGetPackagesPath>
</PropertyGroup>