title: Scaffold-DbContext: command not found
body: <p>i try to reverse engnieer my models from an existing database, but the command: <code>Scaffold-DbContext "Server=(db);Database=xxxx;Trusted_connection=true;" Microsoft.EntityFrameWorkCore.SqlServer -OutputDir Models</code>
  doesn´t work.</p>
  
  <p>I get the error message like in the title.</p>
  
  <p>I installed the Nuget packeges :</p>
  
  <pre><code>Microsoft.EntityFrameworkCore.SqlServer
  Microsoft.EntityFrameworkCore.Tools
  Microsoft.EntityFrameworkCore.SqlServer.Design
  </code></pre>
  
  <p>and i don´t know why it doesn´t work.(<code>dotnet ef</code> commands works)
  I´m sure its a little problem but i can´t find the solution. Please help me</p>
  
  <p>My .csproj:</p>
  
  <pre><code>&lt;Project Sdk="Microsoft.NET.Sdk.Web"&gt;
    &lt;PropertyGroup&gt;
      &lt;TargetFramework&gt;netcoreapp1.1&lt;/TargetFramework&gt;
    &lt;/PropertyGroup&gt;
    &lt;ItemGroup&gt;
      &lt;PackageReference Include="IdentityServer4"&gt;
        &lt;Version&gt;1.5.0&lt;/Version&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="IdentityServer4.AccessTokenValidation"&gt;
        &lt;Version&gt;1.2.0&lt;/Version&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="IdentityServer4.AspNetIdentity"&gt;
        &lt;Version&gt;1.0.1&lt;/Version&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.AspNetCore" Version="1.1.1" /&gt;
      &lt;PackageReference Include="Microsoft.AspNetCore.Identity"&gt;
        &lt;Version&gt;1.1.1&lt;/Version&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore"&gt;
        &lt;Version&gt;1.1.1&lt;/Version&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.AspNetCore.Mvc" Version="1.1.2" /&gt;
      &lt;PackageReference Include="Microsoft.AspNetCore.StaticFiles" Version="1.1.1" /&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore"&gt;
        &lt;Version&gt;1.1.1&lt;/Version&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer"&gt;
        &lt;Version&gt;1.1.2&lt;/Version&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.Design"&gt;
        &lt;Version&gt;1.1.2&lt;/Version&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.Tools"&gt;
        &lt;Version&gt;1.1.1&lt;/Version&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.Extensions.Logging.Debug" Version="1.1.1" /&gt;
      &lt;PackageReference Include="Microsoft.VisualStudio.Web.BrowserLink" Version="1.1.0" /&gt;
    &lt;/ItemGroup&gt;
    &lt;ItemGroup&gt;
        &lt;PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="1.1.1" PrivateAssets="All" /&gt;
      &lt;/ItemGroup&gt;
    &lt;ItemGroup&gt;
      &lt;DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="1.0.1" /&gt;
    &lt;/ItemGroup&gt;
  &lt;/Project&gt;
  </code></pre>