public void AddTask(Task task)
 {
     using (var context = new userandtaskDataContext(_connectionString))
     {
         context.Tasks.InsertOnSubmit(task);
         context.SubmitChanges();
     }
 }
 public void CompleteTask(int id)
 {
     using (var context = new userandtaskDataContext(_connectionString))
     {
         var task = context.Tasks.FirstOrDefault(t => t.Id == id);
         task.Status = Status.Completed;
         context.SubmitChanges();
     }
 }
 public void SelectTask(int userId, int taskId)
 {
     using (var context = new userandtaskDataContext(_connectionString))
     {
         var task = context.Tasks.FirstOrDefault(t => t.Id == taskId);
         task.UserId = userId;
         task.Status = Status.Taken;
         context.SubmitChanges();
     }
 }
        public void Register(User user, string password)
        {
            string passwordSalt = PasswordHelper.GenerateSalt();
            string passwordHash = PasswordHelper.HashPassword(password, passwordSalt);

            user.PasswordHash = passwordHash;
            user.PasswordSalt = passwordSalt;
            using (var context = new userandtaskDataContext(_connectionString))
            {
                context.Users.InsertOnSubmit(user);
                context.SubmitChanges();
            }
        }