Aplikacija kao database server

Code:

        public static DataTable PuniDtReaderom(SqlCommand cmd, DataTable mojaDTabela)
        {
            DataTable dt = new DataTable("dt");
            dt = mojaDTabela;
            dt.Rows.Clear();
            try
            {
                cn.Open();
                dt.Load(cmd.ExecuteReader(CommandBehavior.Default));
            }
            catch (Exception ex)
            {
                System.Windows.MessageBox.Show( ex.ToString());
            }
            finally
            {
                cn.Close();
            }
            return dt;
        }