In my case i need the first and last element of the query result so i made this:

' create my query

dim dc= new dataContext

dim q=From x in dc.table Where x.field=True Select x

'lets say my result contains 4 records

''here we get the first one :

'assuming my field is Integer

dim firstValue as Integer=q.First.field

''now lets get the last one

dim lastValue as Integer=q.Skip(q.Count - 1).First.field

That worked for me.

Hope This help.

If there is something wrong please letme know

P.S. My friend at the office helped me with this idea.