In part9.aspx, line 31:

Product p = db.Products.Single(p => p.ProductName == "Foo");

You can't declare a local variable "p" in the lambda expression here, because "p" is already used to denote the Product. You could change it to something else, like:

Product p = db.Products.Single(prod => prod.ProductName == "Foo");

In Helpers.cs, line 57:

return ExecuteCommand("delete from products where ProductId={0}", instance.ProductID);

DeleteProduct is a void method, so it can't return anything.  You need to get rid of the "return" keyword.

       Dim db As New MOCDataContext

       Dim q = db.SProc_MOCT_CC(0, Nothing, Nothing, Nothing, Nothing, Nothing)

       GridView1.DataSource = q

       GridView1.DataBind()

The first parm is the action, the rest I set to use 'Nothing' to ignore the other parms.  Normally, I would just pass the parms I wanted the 2nd or third parms I would fill in (via class properties) and leave the others.  How can I get around this?  Am I making sense?

where do i get the video?

But!!!!

I try to adapt one VIEW from SQL to LINQ object and it don't work. After it, I use the TABLE and STOREPROCEDURE to save data but I need to pass a parameter manual to SP to indicate that it is an update. So, I can find how pass throught LINQdatasource the value for this parameter.