如何创建包含其他标记帮助程序的自定义标记帮助程序

public class FormControlTextBoxHelper:TagHelper
{

    public override void Process(TagHelperContext context, TagHelperOutput output)
    {
        using (var writer = new StringWriter())
        {
            writer.Write(@"<div class=""form-group"">");

            //Here I want to write <label asp-for="InputModel.Title" class="control-label"></label> and other tag helpers

            writer.Write(@"</div>");

            output.Content.SetHtmlContent(writer.ToString());

        }

    }
}
public class FormControlTextBoxHelper:TagHelper