protected void RenderValidationSummary(TagHelperContext context, TagHelperOutput output)
        {
            if (IsNeedValidationSummary)
            {
                TagBuilder builder = HtmlGenerator.GenerateValidationSummary(ViewContext, false, "", "span", new { @class = "help-block" });
                output.PostContent.AppendHtml(builder);

                State = FormGroupState.Error;
            }
        }
 protected void RenderValidationSummary(TagHelperContext context, TagHelperOutput output)
 {
     if (IsNeedValidationSummary)
     {
         TagBuilder builder1 = HtmlGenerator.GenerateValidationSummary(ViewContext, false, "", "span", new { @class = "help-block" });
         TagBuilder builder2 = new TagBuilder("div")
         {
             TagRenderMode = TagRenderMode.Normal
         };
         builder2.AddCssClass("form-group");
         builder2.AddCssClass("has-error");
         builder2.InnerHtml.AppendHtml(builder1);
         output.PostContent.AppendHtml(builder2);
     }
 }