How do I reference a field in Linq based on a dynamic fieldname

Question

Firstly, apologies for the bad question title - not entirely sure if I am asking the correct thing.

Normally I can do the following to access a field:

Answer 1

Weirdly I have just been reading something similar on Scott Hanselman's blog, this is to set the where or ordering by a field name in a string but I think the select could be done in the same way. See:

http://www.hanselman.com/blog/TheWeeklySourceCode48DynamicQueryableMakesCustomLINQExpressionsEasier.aspx

The core being something like :

Dim Northwind As new NorthwindDataContext
Dim query = Northwind.Products
        .Where("CategoryID=2 And UnitPrice>3")
        .OrderBy("SupplierID")
GridView1.DataSource = query
GridView1.DataBind()

It may require some dynamic data references.