title: ASP.NET MVC5 textarea not outlined in red on validation error
body: <p>I am using ASP.NET MVC5 with Bootstrap, and have the following in a Razor view for a contact form...</p>
  
  <pre><code>@using (Html.BeginForm("Contact", "Home", FormMethod.Post, new {role = "form"})) {
  &lt;div class="form-group"&gt;
  @Html.LabelFor(model =&gt; model.theirname)
  @Html.TextBoxFor(model =&gt; model.theirname, new {@class = "form-control", placeholder = "Enter your name"})
  &lt;div&gt;@Html.ValidationMessageFor(model =&gt; model.theirname, "You must enter your name")&lt;/div&gt;
    @Html.LabelFor(model =&gt; model.theiremail)
    @Html.TextBoxFor(model =&gt; model.theiremail, new {@class = "form-control", placeholder = "Enter your email"})
    &lt;div&gt;@Html.ValidationMessageFor(model =&gt; model.theiremail, "You must enter your email address")&lt;/div&gt;
    @Html.LabelFor(model =&gt; model.message)
    @Html.TextAreaFor(model =&gt; model.message, new {@class = "form-control", placeholder = "Enter message", cols = 40, rows = 5})
    &lt;div&gt;@Html.ValidationMessageFor(model =&gt; model.message, "You must enter a message")&lt;/div&gt;
    &lt;input type="checkbox" id="copytome" name="copytome" checked="@Model.copytome" /&gt; &lt;label for="copytome"&gt;Send me a copy of the message&lt;/label&gt;
    &lt;div&gt;&lt;input type="submit" value="Send" class="btn btn-default" /&gt;&lt;/div&gt;
  &lt;/div&gt;
  }
  </code></pre>
  
  <p>If the user clicks the submit button without filling in their name or email address, the validation message is displayed correctly, and the textboxes are outlined in red.</p>
  
  <p>However, the textarea doesn't get outlined, although the validation message is shown...
  <img src="https://i.stack.imgur.com/Nmvis.png" alt="enter image description here"></p>
  
  <p>Here is the generated HTML...</p>
  
  <pre><code>&lt;form action="/Home/Contact" method="post" role="form"&gt;
  &lt;div class="form-group"&gt;
  &lt;label for="theirname"&gt;Your name&lt;/label&gt;
  &lt;input class="input-validation-error form-control" data-val="true" data-val-required="The Your name field is required." id="theirname" name="theirname" placeholder="Enter your name" type="text" value="" /&gt;
  &lt;div&gt;&lt;span class="field-validation-error" data-valmsg-for="theirname" data-valmsg-replace="false"&gt;You must enter your name&lt;/span&gt;&lt;/div&gt;
  &lt;label for="theiremail"&gt;Your email&lt;/label&gt;
  &lt;input class="input-validation-error form-control" data-val="true" data-val-required="The Your email field is required." id="theiremail" name="theiremail" placeholder="Enter your email" type="text" value="" /&gt;
  &lt;div&gt;&lt;span class="field-validation-error" data-valmsg-for="theiremail" data-valmsg-replace="false"&gt;You must enter your email address&lt;/span&gt;&lt;/div&gt;
  &lt;label for="message"&gt;Message&lt;/label&gt;
  &lt;textarea class="input-validation-error form-control" cols="40" data-val="true" data-val-required="The Message field is required." id="message" name="message" placeholder="Enter message" rows="5"&gt;
  &lt;/textarea&gt;
  &lt;div&gt;&lt;span class="field-validation-error" data-valmsg-for="message" data-valmsg-replace="false"&gt;You must enter a message&lt;/span&gt;&lt;/div&gt;
  &lt;input type="checkbox" id="copytome" name="copytome" /&gt; &lt;label for="copytome"&gt;Send me a copy of the message&lt;/label&gt;
  &lt;div&gt;&lt;input type="submit" value="Send" class="btn btn-default" /&gt;&lt;/div&gt;
  &lt;/div&gt;
  &lt;/form&gt;
  </code></pre>
  
  <p>Anyone any idea why the textarea isn't outlined in red?</p>