using LINQ in Business Layer

[jsc0624]

I'm wondering how can I use LINQ in here?

    public Northwind.ProductsDataTable GetProducts()
    {
[Can I use Linq here?]
        return Adapter.GetProducts();
    }

I followed the way of using Business Layer through this tutorial and I'm wondering how I can use LINQ there:

http://www.asp.net/data-access/tutor...logic-layer-cs