Hi, I've installed BundleTransformer.Less and JavaScriptEngineSwitcher.Msie. My .less file is being included correctly, and it's being minified correctly (in release mode), but the LESS to CSS transform is not being applied. My .less file contains a single @import directive. That file is also being served directly as a download, rather than displayed in the browser like a .css file would be.
I have a previous project using an earlier version of BundleTransformer which works fine, but I can't spot any significant differences if I compare them.
BundleConfig.cs and web.config are attached. Can you tell me what I've done wrong, please? Thanks!
Comments: Hello, Colonel32!
> My .less file is being included correctly, and it's being minified correctly (in release mode), but the LESS to CSS transform is not being applied.
This is caused by an error in `BundleConfig.cs` file:
```
var css = new StyleBundle(LessCSS);
css.Include("~/Content/styles.less");
css.Builder = nullBuilder;
css.Transforms.Add(cssTransformer);
css.Transforms.Add(cssMinifier);
css.Orderer = nullOrderer;
bundles.Add(css);
```
In this case, instead of a `StyleBundle` class you need to use `Bundle` class. I recommend you to read [“Examples of usage”](https://bundletransformer.codeplex.com/wikipage?title=Examples%20of%20usage) section of documentation.
> My .less file contains a single @import directive. That file is also being served directly as a download, rather than displayed in the browser like a .css file would be.
It is possible that you are using a Visual Studio Development Server or old version of IIS, which do not support the IIS integration mode. You need to configure `LessAssetHandler` to run in the IIS classic mode (see [“Bundle Transformer: LESS”](https://bundletransformer.codeplex.com/wikipage?title=Bundle%20Transformer%3a%20LESS) section of documentation).