+1  A: 

Hi All,

Looks like i was missing the plot aboit.

the solutions is very simple.

Here is a little examle.

Thanks

            using (UserEntities ctx = new UserEntities())
        {

            var group = (from g in ctx.Group
                        select g).FirstOrDefault();

            User user = new User();

            user.UserName = "Ian";

            user.UserGroups.Add(new UserGroups { Group = group });

            ctx.AddToUser(user);

            ctx.SaveChanges();
        }
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