CoffeeScriptCompiler.cs

public class CoffeeScriptCompiler : JsMinify
{
    public override void Process(BundleContext context, BundleResponse response)
    {
        var csEngine = new CoffeeSharp.CoffeeScriptEngine();
        string result = string.Empty;
        foreach(var file in response.Files)
        {
            using (var reader = new StreamReader(file.FullName))
            {
                result += csEngine.Compile(reader.ReadToEnd());
            }
        }

        response.Content = result;
        base.Process(context, response);
    }
}