public void OnPost(InvoiceLine[] invoiceLines)
{
    // name di input:
    // invoiceLines[0].Id
    // invoiceLines[0].Product
    // invoiceLines[1].Id
    // invoiceLines[1].Product
    // dst...

    Console.WriteLine("Hello world...");
    Console.WriteLine($"Jumlah data: {invoiceLines.Length}");

    foreach (var row in invoiceLines)
    {
        Console.WriteLine($"Id: {row.Id}");
        Console.WriteLine($"Product: {row.Product}");
        Console.WriteLine();
    }

    Console.ReadKey();
}