CODEWITHSUNDEEP
c#asp.net-mvcef-code-firstvisual-studio-2019entity-framework-6.4
Sunit
Sunit

Reputation: 21

Entity Framework gives error "Could not load file or assembly", "FileNotFoundException" every time whenever I reopen visual Studio 2019

I am using visual studio 2019 Ent and EntityFramework.6.4.4. Whenever I'm restarting my VS19 and going to access EF it gives me the following error with code first approach.

 Exception calling "LoadFrom" with "1" argument(s): "Could not load file or assembly 'file:///("Project Name")\packages\EntityFramework.6.4.4\tools\EntityFramework.PowerShell.Utility.dll' or one of its dependencies. The 
system cannot find the file specified."
At "(Project Name)"\packages\EntityFramework.6.2.0\tools\EntityFramework.psm1:782 char:5
+     $utilityAssembly = [System.Reflection.Assembly]::LoadFrom((Join-P ...
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : FileNotFoundException
 
You cannot call a method on a null-valued expression.
At "(Project Name)"\packages\EntityFramework.6.2.0\tools\EntityFramework.psm1:783 char:5
+     $dispatcher = $utilityAssembly.CreateInstance(
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : InvalidOperation: (:) [], RuntimeException
    + FullyQualifiedErrorId : InvokeMethodOnNull
 
Exception calling "CreateInstanceFrom" with "8" argument(s): "Could not load file or assembly 'file:///"(Project Name)"\packages\EntityFramework.6.4.4\tools\EntityFramework.PowerShell.dll' or one of its dependencies. The system 
cannot find the file specified."
At "(Project Name)"\packages\EntityFramework.6.2.0\tools\EntityFramework.psm1:811 char:5
+     $domain.CreateInstanceFrom(
+     ~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : NotSpecified: (:) [], MethodInvocationException
    + FullyQualifiedErrorId : FileNotFoundException

What I have tried so far: I found one temporary solution that by reinstalling every time nugete package i.e entity framework and it works. But this is annoying and definitely not the solution. Looking for a permanent solution. Thanks in advance.

Upvotes: 2

Views: 2519

Answers (1)

Nir
Nir

Reputation: 2082

In my case I was executing the

Add-Migration

command. Instead, I used

EntityFramework6\Add-Migration

And I had no more errors. (Thanks to this answer I found https://stackoverflow.com/a/58951090/2546759)

Another thing which did the trick was:

  1. Make sure that all projects in the solution are using same EF version.
  2. Restart Visual Studio.

(As suggested here: https://stackoverflow.com/a/70004476/2546759)

Upvotes: 8

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