title: SwaggerUI not display enum summary description, C# .net core?
body: <p>I used <a href="https://docs.microsoft.com/en-us/aspnet/core/tutorials/getting-started-with-swashbuckle?view=aspnetcore-2.1&amp;tabs=visual-studio#xml-comments" rel="noreferrer">https://docs.microsoft.com/en-us/aspnet/core/tutorials/getting-started-with-swashbuckle?view=aspnetcore-2.1&amp;tabs=visual-studio#xml-comments</a> to show my classes summaries description in SwaggerUI, it's OK but not show <code>enum</code> summary description !<br>
  My <code>startup.cs</code></p>
  
  <pre><code>services.AddSwaggerGen(c =&gt;
  {   
      c.SwaggerDoc("v1", new Info
      {
          Version = "v1",
          Title = "My App-Service",
          Description = "My Description",
      });
      c.IncludeXmlComments(Path.Combine(AppContext.BaseDirectory, $"{Assembly.GetExecutingAssembly().GetName().Name}.xml"));  
      c.DescribeAllEnumsAsStrings();
  });
  </code></pre>
  
  <p>My <code>enum</code>:</p>
  
  <pre><code>public enum GenderEnum
  {
      /// &lt;summary&gt;
      /// Man Description
      /// &lt;/summary&gt;
      Man = 1,
  
      /// &lt;summary&gt;
      /// Woman Description
      /// &lt;/summary&gt;
      Woman = 2
  }
  </code></pre>
  
  <p>It shows something like following:<br>
  <a href="https://i.stack.imgur.com/erN14.png" rel="noreferrer"><img src="https://i.stack.imgur.com/erN14.png" alt="Swagger UI enum"></a></p>
  
  <p>I want to show <code>Man Description</code> and <code>Woman Description</code> in SwaggerUI<br>
  like this: </p>
  
  <pre><code>Man = 1, Man Description
  Woman = 2,  Woman Description
  </code></pre>
  
  <p><br>
  I'm using <code>Swashbuckle.AspNetCore v4.0.1</code> package</p>