public static class HeaderHelper
{
    public static MvcHtmlString StandardHeader(this HtmlHelper htmlHelper,
        string title,
        string description="")
    {
        var tbSection= new TagBuilder("div");
        tbSection.AddCssClass("page-header");

        var tbTitle = new TagBuilder("h2") {InnerHtml = title};
        if (!string.IsNullOrEmpty(description))
        {
            var tbDescription = new TagBuilder("p") {InnerHtml = description};
            tbSection.InnerHtml = string.Concat(tbTitle, tbDescription);
        }
        else
        {
            tbSection.InnerHtml = tbTitle.ToString();
        }

        return MvcHtmlString.Create(tbSection.ToString());
    }
}

@Html.StandardHeader("View Employees")

@Html.StandardHeader("Edit Employee","...some description...")

@Html.StandardHeader(ViewBag.Title)

@Html.StandardHeader(ViewBag.Title.ToString())