public override void Process(TagHelperContext context, TagHelperOutput output)
{
output.TagName = "link";
output.Attributes.SetAttribute("rel", Rel);
var url = string.Concat(AppWebInfoHelper.CssDomain, Href.TrimStart('~'), "?v=",
Version ? AppInfoHelper.AppVersion : string.Empty);
output.Attributes.SetAttribute("href", url);
}