title: Error NU1105 Unable to find project information - The project file may be invalid or missing targets required for restore
body: <p>All of a sudden, I am getting the following errors for 3 projects in a solution:</p>
  <pre><code>Error NU1105 Unable to find project information for 'C:\code\example\src\libs\example.I18n\example.I18n.csproj'. 
  The project file may be invalid or missing targets required for restore.
  </code></pre>
  <p>The only thing that has changed in the project is a couple of DB changes, but I never had any issues in the past. The only other thing is that I updated to Visual Studio 2017 15.5. Could that cause issues?</p>
  <p>I have tried removing and recloning the solution from source control, but still getting errors. No problems on my colleagues' machines, so it must be something local.</p>
  <p>Example of one of the .csproj files if this helps:</p>
  <pre class="lang-xml prettyprint-override"><code>&lt;Project Sdk=&quot;Microsoft.NET.Sdk&quot;&gt;
  
    &lt;PropertyGroup&gt;
      &lt;TargetFramework&gt;net452&lt;/TargetFramework&gt;
      &lt;AssemblyName&gt;Example.I18n&lt;/AssemblyName&gt;
      &lt;PackageId&gt;Example.I18n&lt;/PackageId&gt;
      &lt;GenerateAssemblyConfigurationAttribute&gt;false&lt;/GenerateAssemblyConfigurationAttribute&gt;
      &lt;GenerateAssemblyCompanyAttribute&gt;false&lt;/GenerateAssemblyCompanyAttribute&gt;
      &lt;GenerateAssemblyProductAttribute&gt;false&lt;/GenerateAssemblyProductAttribute&gt;
    &lt;/PropertyGroup&gt;
  
    &lt;ItemGroup&gt;
      &lt;PackageReference Include=&quot;Microsoft.AspNetCore.Mvc.Core&quot; Version=&quot;1.1.2&quot; /&gt;
      &lt;PackageReference Include=&quot;Microsoft.Extensions.Logging&quot; Version=&quot;1.1.1&quot; /&gt;
      &lt;PackageReference Include=&quot;MessageFormat&quot; Version=&quot;1.0.1&quot; /&gt;
    &lt;/ItemGroup&gt;
  
    &lt;ItemGroup Condition=&quot; '$(TargetFramework)' == 'net452' &quot;&gt;
      &lt;Reference Include=&quot;System&quot; /&gt;
      &lt;Reference Include=&quot;Microsoft.CSharp&quot; /&gt;
    &lt;/ItemGroup&gt;
  
  &lt;/Project&gt;
  </code></pre>