TagBuilder div = new TagBuilder("div"); div.AddCssClass("my-class"); // output:
TagBuilder p = new TagBuilder("p"); p.AddCssClass("class1 class2 class3"); // output:
TagBuilder img = new TagBuilder("img"); if (isMobileDevice) { img.AddCssClass("mobile-only"); } // output (if isMobileDevice is true): // output (if isMobileDevice is false):The TagBuilder class is part of the System.Web.Mvc package library, which is used in ASP.NET MVC applications.