public int Update(Model m)
{
            Type t = m.GetType();
            PropertyInfo[] pis = t.GetProperties();
            StringBuilder sb = new StringBuilder();
            SqlParameter[] sp = new SqlParameter[pis.Length];
            sb.Append("UPDATE [dbName].[dbo].[tableName] SET ");
            int index = 0;
            foreach (PropertyInfo item in pis)
            {
                if (index == 0) sb.Append(string.Format("{0}=@{0}", item.Name));
                else sb.Append(string.Format(",{0}=@{0}", item.Name));
                sp[index] = new SqlParameter("@" + item.Name, item.GetValue(m, null));
                index++;
            }
            sb.Append(" WHERE id=@id");

            int i = ExecuteNonQuery.....;
            return i;

}