@using (Ajax.BeginForm("Save", new AjaxOptions { }))
{
  @Html.AntiForgeryToken()

  <fieldset>
    <legend>Category</legend>

    @Html.HiddenFor(model => model.CategoryId)

    <p>@((Model.CategoryId > 0 ? "Edit" : "New") + " category")</p>

    <div class="editor-label">
      @Html.LabelFor(model => Model.Title)
    </div>
    <div class="editor-field">
      @Html.EditorFor(model => Model.Title)
      @Html.ValidationMessageFor(model => Model.Title)
    </div>

    <div class="editor-label">
      @Html.LabelFor(model => Model.Description)
    </div>
    <div class="editor-field">
      @Html.EditorFor(model => Model.Description)
      @Html.ValidationMessageFor(model => Model.Description)
    </div>

    <p>
      <input type="submit" value="Save">
      @Html.ValidationSummary(true)
    </p>
  </fieldset>
}