public static string Submit(this System.Web.Mvc.HtmlHelper html, string name, string value)
{
    TagBuilder tagBuilder = new TagBuilder("input");
    tagBuilder.MergeAttribute("value", value);
    tagBuilder.MergeAttribute("name", name);
    tagBuilder.MergeAttribute("type", "submit");
    return tagBuilder.ToString(TagRenderMode.SelfClosing);
}

Easy submit button creation through

<%=Html.Submit("submit", "Your Text") %>