using System;

​

public class Program

{

    public static void Main()

    {

        ExtractValues(1234.567m);

        ExtractValues(1234.56789m);

    }

​

    private static void ExtractValues(decimal barcodeField)

    {

        decimal barcodeDecimals = barcodeField % 1m;

        int barcode = (int)barcodeField;

        int environment, pageNumber = 0;

        // If there are only 3 decimals then only the environment is present, otherwise assume the page number is present, too.

        if (barcodeDecimals * 1000 % 1m == 0)

        {

            Console.WriteLine("environment only");

            environment = (int)(barcodeDecimals * 1000);

        }

        else

        {

            Console.WriteLine("environment and page number");

            pageNumber = (int)((barcodeDecimals % 1m) * 100); //12

            environment = (int)((barcodeDecimals * 100 % 1m) * 1000); //345

        }

​

        Console.WriteLine($"Barcode: {barcode}");

        Console.WriteLine($"Pagenumber: {pageNumber}");

        Console.WriteLine($"Environment: {environment}");

    }

}