/// <summary>
/// Data access layer. Gets products by the collection of the specific product' ID.
/// </summary>
/// <param name="conn"></param>
/// <param name="productIDs"></param>
/// <returns></returns>
public static Collection<Product> GetProductsByIDs(SqlConnection conn, Collection<int> productIDs)
{
    Collection<Product> products = new Collection<Product>();
    DataTable dtProductIDs = new DataTable("Product");
    dtProductIDs.Columns.Add("ID", typeof(int));

    foreach (int id in productIDs)
    {
        dtProductIDs.Rows.Add(
            id
        );
    }

    SqlParameter tvpProduct = new SqlParameter("@ProductIDsTVP", dtProductIDs);
    tvpProduct.SqlDbType = SqlDbType.Structured;
    //SqlHelper.ExecuteNonQuery(conn, CommandType.StoredProcedure, "procGetProducts", tvpProduct);

    using (SqlDataReader dataReader = SqlHelper.ExecuteReader(conn, CommandType.StoredProcedure, "procGetProductsByProductIDsTVP", tvpProduct))
    {
        while (dataReader.Read())
        {
            Product product = new Product();
            product.ID = dataReader.IsDBNull(0) ? 0 : dataReader.GetInt32(0);
            product.Name = dataReader.IsDBNull(1) ? (string)null : dataReader.GetString(1).Trim();

            products.Add(product);
        }
    }
    return products;
}