< 1 min read

 var predicate = PredicateBuilder.True();
 var q = db.Profiles.Where(t => !t.aspnet_Users.aspnet_Membership.IsLockedOut);
 foreach (string keyword in pars)
 {
     string temp = keyword;
     predicate = predicate.And(t => t.FirstName.StartsWith(temp) || t.LastName.StartsWith(temp));
 }