private static void ProvideMissingParameters(System.Data.Common.DbParameterCollection parameters)
{
SqlParameter userId = new SqlParameter("@UserId", System.Data.SqlDbType.Int);
SqlParameter price = new SqlParameter("@Price", System.Data.SqlDbType.Money);
SqlParameter contactInfo = new SqlParameter("@ContactInfo", System.Data.SqlDbType.NText);
userId.Value = DBNull.Value;
price.Value = DBNull.Value;
contactInfo.Value = DBNull.Value;
parameters.AddRange(new SqlParameter[] { userId, price, contactInfo });
}