title: Error on Scafolding EF Core 1.0 to Existing Db
body: <p>Today I installed latest version of ASP.NET Core 1.0 and VS2015 Update 3 (released on June 27) on Win 7. And followed an MS Article and got the following error on <a href="https://ef.readthedocs.io/en/latest/platforms/aspnetcore/existing-db.html#reverse-engineer-your-model" rel="nofollow">this step of the article</a>:</p>
  
  <pre><code>Unable to find expected assembly attribute named DesignTimeProviderServicesAttribute in provider assembly Microsoft.EntityFrameworkCore. This attribute is required to identify the class which acts as the design-time service provider factory.
  </code></pre>
  
  <p>My command is as follows:</p>
  
  <pre><code>Scaffold-DbContext "Server=MyComputerName\SQL2012;Database=northwind;Trusted_Connection=True;" -OutputDir ".\Models"  Microsoft.EntityFrameworkCore
  </code></pre>
  
  <p><strong>project.json File one section</strong></p>
  
  <pre><code>"tools": {
      "BundlerMinifier.Core": "2.0.238",
      "Microsoft.AspNetCore.Razor.Tools": "1.0.0-preview2-final",
      "Microsoft.AspNetCore.Server.IISIntegration.Tools": "1.0.0-preview2-final",
      "Microsoft.EntityFrameworkCore.Tools": "1.0.0-preview2-final",
      "Microsoft.Extensions.SecretManager.Tools": "1.0.0-preview2-final",
      "Microsoft.VisualStudio.Web.CodeGeneration.Tools": {
        "version": "1.0.0-preview2-final",
        "imports": [
          "portable-net45+win8"
        ]
      }
    },
  </code></pre>
  
  <p>On win 8.1 with SQL Express 2014, with the above release of ASP.NET Core and VS2015 Update 3, I can successfully follow all the steps in the above article without any error.</p>