title: Add querystring to "asp-page" link in CORE razor pages
body: <p>In CORE razor pages</p>
  
  <pre><code>&lt;a asp-page="View" asp-route-ID="@item.ID" &gt;View&lt;/a&gt;
  </code></pre>
  
  <p>this creates a link to a page using a route to pass the ID and generates the following HTML </p>
  
  <pre><code>&lt;a href="view/666"&gt;View&lt;/a&gt;
  </code></pre>
  
  <p>I want to add the contents of the querystring to this link so the generated HTML looks like</p>
  
  <pre><code>&lt;a href="view/666/?s=smith"&gt;View&lt;/a&gt;
  </code></pre>
  
  <p><code>@Request.QueryString</code> gets the entire querystring e.g. <code>"?s=smith"</code> but I can't find the way to add it to the end.</p>
  
  <p>Any ideas.</p>