ファイルまたはアセンブリツール\ EntityFramework .PowerShell.Utility.dll 'を読み込めませんでした。

Question

Entity Framework 6.1.3をインストールしようとすると、パッケージマネージャコンソールから。 次の出力が表示されます。

Install-Package EntityFramework 
Attempting to gather dependency information for package 'EntityFramework.6.1.3' with respect to project 'OnlineShop', targeting '.NETFramework,Version=v4.6.1' 
Attempting to resolve dependencies for package 'EntityFramework.6.1.3' with DependencyBehavior 'Lowest' 
Resolving actions to install package 'EntityFramework.6.1.3' 
Resolved actions to install package 'EntityFramework.6.1.3' 
Adding package 'EntityFramework.6.1.3' to folder 'D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop\packages' 
Added package 'EntityFramework.6.1.3' to folder 'D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop\packages' 
Added package 'EntityFramework.6.1.3' to 'packages.config' 
Executing script file 'D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop\packages\EntityFramework.6.1.3\tools\install.ps1' 
Exception calling "LoadFrom" with "1" argument(s): "Could not load file or asse 
mbly 'file:///D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop 
\packages\EntityFramework.6.1.3\tools\EntityFramework.PowerShell.Utility.dll' o 
r one of its dependencies. The system cannot find the file specified." 
At D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop\packages\E 
ntityFramework.6.1.3\tools\EntityFramework.psm1:780 char:5 
+  $utilityAssembly = [System.Reflection.Assembly]::LoadFrom((Join-Path $Too 
lsP ... 
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
~~~ 
    + CategoryInfo   : NotSpecified: (:) [], MethodInvocationException 
    + FullyQualifiedErrorId : FileNotFoundException 

You cannot call a method on a null-valued expression. 
At D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop\packages\E 
ntityFramework.6.1.3\tools\EntityFramework.psm1:781 char:5 
+  $dispatcher = $utilityAssembly.CreateInstance(
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo   : InvalidOperation: (:) [], RuntimeException 
    + FullyQualifiedErrorId : InvokeMethodOnNull 

Exception calling "CreateInstanceFrom" with "8" argument(s): "Could not load fi 
le or assembly 'file:///D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\ 
OnlineShop\packages\EntityFramework.6.1.3\tools\EntityFramework.PowerShell.dll' 
or one of its dependencies. The system cannot find the file specified." 
At D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop\packages\E 
ntityFramework.6.1.3\tools\EntityFramework.psm1:809 char:5 
+  $domain.CreateInstanceFrom(
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo   : NotSpecified: (:) [], MethodInvocationException 
    + FullyQualifiedErrorId : FileNotFoundException 

Exception calling "LoadFrom" with "1" argument(s): "Could not load file or asse 
mbly 'file:///D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop 
\packages\EntityFramework.6.1.3\tools\EntityFramework.PowerShell.Utility.dll' o 
r one of its dependencies. The system cannot find the file specified." 
At D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop\packages\E 
ntityFramework.6.1.3\tools\EntityFramework.psm1:780 char:5 
+  $utilityAssembly = [System.Reflection.Assembly]::LoadFrom((Join-Path $Too 
lsP ... 
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
~~~ 
    + CategoryInfo   : NotSpecified: (:) [], MethodInvocationException 
    + FullyQualifiedErrorId : FileNotFoundException 

You cannot call a method on a null-valued expression. 
At D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop\packages\E 
ntityFramework.6.1.3\tools\EntityFramework.psm1:781 char:5 
+  $dispatcher = $utilityAssembly.CreateInstance(
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo   : InvalidOperation: (:) [], RuntimeException 
    + FullyQualifiedErrorId : InvokeMethodOnNull 

Exception calling "CreateInstanceFrom" with "8" argument(s): "Could not load fi 
le or assembly 'file:///D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\ 
OnlineShop\packages\EntityFramework.6.1.3\tools\EntityFramework.PowerShell.dll' 
or one of its dependencies. The system cannot find the file specified." 
At D:\Leva\Work\Informatika\CSharp\My OPENSOURCE projects\OnlineShop\packages\E 
ntityFramework.6.1.3\tools\EntityFramework.psm1:809 char:5 
+  $domain.CreateInstanceFrom(
+  ~~~~~~~~~~~~~~~~~~~~~~~~~~~ 
    + CategoryInfo   : NotSpecified: (:) [], MethodInvocationException 
    + FullyQualifiedErrorId : FileNotFoundException 


Type 'get-help EntityFramework' to see all available Entity Framework commands. 
Successfully installed 'EntityFramework 6.1.3' to OnlineShop 

あなたが見ることができるように、そこには結局exception.Butされ、私はSystem.Data.Entityへの参照を追加する場合、Entity Frameworkの6.1.3が正常にexceptions.Besidesにもかかわらず、プロジェクトに追加され、私はSystem.Data.Entity名前空間に接続することはできませんし、この名前空間のライブラリを使用します。それは何とか上記の例外に言及して接続し、これを修正する方法は？

Answer 1

Entity Framework 6.1.3をEntity Framework 6.1.2にアップデートすることでこの問題を解決しました。これはおそらく最新バージョンのバグです。

Answer 2

同様のエラーが発生し、EntityFramework.6.1.3.nupkgのすべてのツールフォルダを抽出して解決しました。このパッケージは次のフォルダにあります。

[your solution directory]\packages\EntityFramework.6.1.3)