Best way for retrieving single record results in LINQ to SQL

Question

If I query a table with a condition on the key field as in:

        var user = from u in dc.Users
                   where u.UserName == usn
                   s         


        

Answer 1

I would use the SingleOrDefault method.

var user = (from u in dc.Users
                   where u.UserName == usn
                   select u).SingleOrDefault();