using System;

public class Program

{

    public static void Main()

    {

        string test = WriteItem("-", "0.41666667", "Lambrusco Emilia Rosato 75cl", "5.00");

        Console.WriteLine(test);

    }

    public static string WriteItem(string modifier, string qty, string libelle, string price)

    {

        string itemLineQty = modifier + " " + qty + " x ";

        string itemLinePrice = " " + price + " \u20ac";

​

        int lengthSubstring = 19 - (itemLineQty.Length + itemLinePrice.Length);

​

        string itemLineName = libelle.Substring(0, lengthSubstring > libelle.Length ? libelle.Length : lengthSubstring);

​

        string itemLine = itemLineQty + itemLineName + itemLinePrice;

​

        return itemLine;

    }

}