title: How do I clean up Entity Framework libraries used
body: <p>I'm new at this. During the development of the project, I did not know the difference between the EF versions. I have used both the EF Framework family and the EF Core family. Now the project is finished, I want to delete Core, but I don't know how to start.</p>
  <pre><code>using System.Data.Entity; 
  </code></pre>
  <p>This is the old version?</p>
  <pre><code>using Microsoft.EntityFrameworkCore;
  </code></pre>
  <p>Is this the Core version?</p>
  <p>In NuGet:</p>
  <pre><code>EntityFramework 6.1.3
  Microsoft.EntityFrameworkCore 3.1.1
  </code></pre>
  <p>How can I check which package I am using the most? How to remove the one that is less used without breaking the project?</p>