title: How to extend existing entity in ASP.NET Boilerplate?
body: <p>I have read the documentation on <a href="https://aspnetzero.com/Documents/Extending-Existing-Entities#extending-non-abstract-entities" rel="nofollow noreferrer">Extending Non-Abstract Entities</a>, and done that accordingly (inherit the <code>Edition</code> entity). But the <code>Up</code> function in migration class is empty.</p>
  
  <p><code>MyEdition</code> class is below:</p>
  
  <pre><code>using System;
  using System.Collections.Generic;
  using System.Text;
  using Abp.Application.Editions;
  
  namespace Boilerplate.Editions
  {
      public class MyEdition: Edition
      {
          public virtual long Price { get; set; }
      }
  }
  </code></pre>
  
  <p>The migration is automatically generated using Add-Migration command of Entity Framework Core.</p>
  
  <p>My migration is below:</p>
  
  <pre><code>public partial class Added_MyEdition_Entity : Migration
  {
      protected override void Up(MigrationBuilder migrationBuilder)
      {
  
      }
  
      protected override void Down(MigrationBuilder migrationBuilder)
      {
  
      }
  }
  </code></pre>
  
  <p>So, how to extend existing entity in ASP.NET Boilerplate?</p>