title: -Namespace option is not recognized in Scaffold-DbContext
body: <p>According to <a href="https://docs.microsoft.com/en-us/ef/core/miscellaneous/cli/powershell#scaffold-dbcontext" rel="nofollow noreferrer">MS Docs</a>, <code>Scaffold-DbContext</code> should accpect a optional parameter <code>-Namespace</code>. However, seems that <code>Scaffold-DbContext</code> cannot recognize this parameter. Did I miss something?</p>
  
  <hr>
  
  <p>Command Error:</p>
  
  <pre><code>Scaffold-DbContext "Server=.\SQLExpress;Database=Stock;Trusted_Connection=True;User Id=sa;Password=P@ssw0rd;" Microsoft.EntityFrameworkCore.SqlServer -Namespace Stock.Models.DTO
  
  Scaffold-DbContext : A parameter cannot be found that matches parameter name 'Namespace'.
  At line:1 char:151
  + ... P@ssw0rd;" Microsoft.EntityFrameworkCore.SqlServer -Namespace Stock.M ...
  +                                                        ~~~~~~~~~~
      + CategoryInfo          : InvalidArgument: (:) [Scaffold-DbContext], ParameterBindingException
      + FullyQualifiedErrorId : NamedParameterNotFound,Scaffold-DbContext
  
  </code></pre>
  
  <p>Packages installed:</p>
  
  <pre><code>  &lt;ItemGroup&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.4" /&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.4"&gt;
        &lt;PrivateAssets&gt;all&lt;/PrivateAssets&gt;
        &lt;IncludeAssets&gt;runtime; build; native; contentfiles; analyzers; buildtransitive&lt;/IncludeAssets&gt;
      &lt;/PackageReference&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.Relational.Design" Version="1.1.6" /&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="3.1.4" /&gt;
      &lt;PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="3.1.4"&gt;
        &lt;PrivateAssets&gt;all&lt;/PrivateAssets&gt;
        &lt;IncludeAssets&gt;runtime; build; native; contentfiles; analyzers; buildtransitive&lt;/IncludeAssets&gt;
      &lt;/PackageReference&gt;
    &lt;/ItemGroup&gt;
  </code></pre>