Rollback transaction using LINQ-to-SQL in entity framework?

using (dbDataContext db = new dbDataContext())
using (var dbContextTransaction = db.Database.BeginTransaction()) 
{
    try
    { 
        var user = new User(){ID = 1, Name = "Nick"};
        db.Users.Add(user);
        db.SaveChanges();
        dbContextTransaction.Commit(); 
    } 
    catch (Exception) 
    { 
        dbContextTransaction.Rollback(); 
    }
}