DataAccessLayer.DataBase.UpdateMail C# (CSharp) Method

        public bool UpdateMail(Guid id, string newMail)
        {
            var queryString =
                 "UPDATE [dbo].[accounts] " +
                 "SET mail = @mail " +
                 "WHERE [dbo].accounts.accountid = @accountid";

            using (SqlConnection connection = new SqlConnection(_connectionString))
            {
                var command = new SqlCommand(queryString, connection);

                command.Parameters.AddWithValue("mail", newMail);
                command.Parameters.AddWithValue("accountid", id);

                try
                {
                    connection.Open();
                    command.ExecuteNonQuery();
                }
                catch (Exception)
                {
                    throw;
                }

                return true;
            }
        }