@model Nop.Web.Models.Catalog.ProductModel.ProductVariantModel
@if (!String.IsNullOrWhiteSpace(Model.DownloadSampleUrl))
{
    <div class="downloadsample">
        <span class="downloadsamplebutton">
            <a href="@Model.DownloadSampleUrl">@T("Products.DownloadSample")</a>
        </span>
    </div>
}