how call bundleconfig in Application_Start() mvc

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MVC5

iam use this code in BundleConfig.cs
how call in global.cs
iam see this error
Error 1'Lab.web.BundleConfig' does not contain a definition for 'BundleConfig'

BundleConfig.BundleConfig(BundleTable.Bundles);

  public class AsIsBundleOrderer : IBundleOrderer
    {
            public virtual IEnumerable<BundleFile> OrderFiles(BundleContext context, IEnumerable<BundleFile> files)
            {
                return files;
            }
    }

    public static class  BundleConfig
    {
        private static void addBundle(string virtualPath, bool isCss, params string[] files)
        {
            BundleTable.EnableOptimizations = true;

            var existing = BundleTable.Bundles.GetBundleFor(virtualPath);
            if (existing != null)
                return;

            var newBundle = isCss ? new Bundle(virtualPath, new CssMinify()) : new Bundle(virtualPath, new JsMinify());
            newBundle.Orderer = new AsIsBundleOrderer();

            foreach (var file in files)
                newBundle.Include(file);

            BundleTable.Bundles.Add(newBundle);
        }

        public static IHtmlString AddScripts(string virtualPath, params string[] files)
        {
            addBundle(virtualPath, false, files);
            return Scripts.Render(virtualPath);
        }

        public static IHtmlString AddStyles(string virtualPath, params string[] files)
        {
            addBundle(virtualPath, true, files);
            return Styles.Render(virtualPath);
        }

        public static IHtmlString AddScriptUrl(string virtualPath, params string[] files)
        {
            addBundle(virtualPath, false, files);
            return Scripts.Url(virtualPath);
        }

        public static IHtmlString AddStyleUrl(string virtualPath, params string[] files)
        {
            addBundle(virtualPath, true, files);
            return Styles.Url(virtualPath);
        }


    }
}