BundleContext context = new BundleContext(
Bundle cssBundle = BundleTable.Bundles.GetBundleFor("~/Content/css");
BundleResponse response = cssBundle.GenerateBundleResponse(context);
CssMinify cssMinify = new CssMinify();
Note that I'm using this to inline CSS for this blog. The pages are cached so I'm not worried about how well this action performs. My blog is also basically all landing pages so I'm also not worried about caching a non-inline version for later use, I just drop all the CSS on every page.