title: Method UseSqlServer not recognized in options when registering database under .NET Core 3.0
body: <p>According to <a href="https://docs.microsoft.com/en-us/aspnet/core/data/ef-mvc/intro?view=aspnetcore-2.2#register-the-schoolcontext" rel="nofollow noreferrer">the docs</a>, the context can be added using the following syntax.</p>
  
  <pre><code>services.AddDbContext&lt;Context&gt;(
    options=&gt;options.UseSqlServer("beep"));
  </code></pre>
  
  <p>It works in previous versions of Core 2.x and below. However, now that I try out Core 3.0 preview it seems that the method isn't present according to the intellisense. There's a bunch of <code>options.UseXxx</code>'s but nothing about databases or SQL.</p>
  
  <p>Googling gave a number of hits like <a href="https://github.com/aspnet/EntityFrameworkCore/issues/7891" rel="nofollow noreferrer">this one</a> but all of them are from 2017 and seem to relate to an old issue in the initial versions of .NET Core, while info on the newest version seems not to be available.</p>
  
  <p>I've check the <a href="https://docs.microsoft.com/en-us/ef/core/what-is-new/ef-core-3.0/breaking-changes" rel="nofollow noreferrer">breaking changes</a> for .NET Core 3.0 but didn't recognize anything relevant there.</p>
  
  <p>How do I register an SQL database in .NET Core 3.0?</p>