My WPF/EntityFramework application don't work on other computer

Question

I have created a WPF application that uses Entity Framework/code first on LocalDb (I have created my database on a "model" directory and all seems fine).

It works pretty good on my laptop and I wanted to share it with my friend but it doesn't work. I think I have a SQL error on the other computer but it doesn't show it. It just shows a windows application error... I think it's when I try to load my database context.

My database context:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Data.Entity;

namespace ModernUINavigationApp1.Model
{
    class Supcontext : DbContext 
    {
        public DbSet<InfosConnexion> InfosConnexions { get; set; }
        public DbSet<InfosFichiers> InfosFiles { get; set; }
        public DbSet<Log> Logs { get; set; }
    }
}

My app.config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <configSections>
    <!-- For more information on Entity Framework configuration, visit http://go.microsoft.com/fwlink/?LinkID=237468 -->
    <section name="entityFramework" type="System.Data.Entity.Internal.ConfigFile.EntityFrameworkSection, EntityFramework, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" requirePermission="false" />
  </configSections>
  <entityFramework>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.LocalDbConnectionFactory, EntityFramework">
      <parameters>
        <parameter value="mssqllocaldb" />
      </parameters>
    </defaultConnectionFactory>
    <providers>
      <provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />
    </providers>
  </entityFramework>
</configuration>

EDIT:

The localDb is installed, I can build and run a new entity framework solution on every computers and see the localdb on server explorer (on visual studio) for each. On my solution (the one that I try to share) an on an other computer, I have delete the app.config, delete and re-import entity framework, and enable migration and update db on the console and then it works, but it's not the right/better solution I think.

Answer 1

If you open an already existing Visual Studio solution with entity framework (and localdb) from an other computer, you have to delete entity framework from this solution by:

1. right clicking on the solution (on the solution explorer in visual studio),
2. choosing packet manager
3. removing entity framework and install it again (also in the packet manager).

This will generate a new app.config with the correct lines configuration and it should work.

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_{This answer was posted as an edit to the question My WPF/EntityFramework application don't work on other computer by the OP Nimp under CC BY-SA 3.0.}