title: Remove multiple selection from asp.net core application
body: <p>I have <code>List&lt;SelectListItem&gt;</code> variable with two values. I want to represent it as dropdown box in html so I'm doing like this.</p>
  
  <pre><code>&lt;div class="form-group row"&gt;
      &lt;label asp-for="Roles" class="col-sm-2 col-sm-offset-2 form-control-label"&gt;&lt;/label&gt;
      &lt;div class="col-md-6"&gt;
          &lt;select asp-for="Roles" asp-items="@Model.Roles" class="form-control selectpicker bs-select-hidden"&gt;&lt;/select&gt;
      &lt;/div&gt;           
  &lt;/div&gt;
  </code></pre>
  
  <p>and this code shows me the list with those two items, but it also generates </p>
  
  <pre><code>multiple="multiple"
  </code></pre>
  
  <p>attribute for select tag. </p>
  
  <p>How can I make not to generate multiple attribute?</p>