C#

The process of converting an object into a stream of bytes in order to store the object or transmit it to memory, a database, or a file is Serialization in C# right? i dont have an idea how to do it though...

using System;

class PriceCalc
{
    static void Main(string[] args)
    {
        float costPrice = 0.0f;
        float profit;
        float tax;
        float totalCost = 0.0f;
        float totalProfit = 0.0f;
        float totalTax = 0.0f;
        bool finished = false;
        float salePrice;

        string priceString;
        string nameString;
        float taxRate = 0.2f;

        while (!finished)
        {
            Console.Write("Enter the name of the product : ");

            nameString = Console.ReadLine();
            Console.WriteLine("Product is " + nameString);
            if (nameString.Length != 0)
            {
                finished = true;
            }
            else
            {
                bool dataOK = false;
                while (!dataOK)
                {
                    Console.Write("Enter price of the product : ");
                    priceString = Console.ReadLine();
                    try
                    {
                        costPrice = float.Parse(priceString);
                        dataOK = true;
                    }
                    catch
                    {
                        Console.WriteLine("That is not a valid number");
                        Console.WriteLine("Enter a number, e.g. 15.5");
                    }
                }

                if (costPrice < 20.0f)
                {
                    profit = costPrice * 0.2f;
                }
                else
                {
                    if (costPrice < 40.0f)
                    {
                        profit = costPrice * 0.15f;
                    }
                    else
                    {
                        profit = costPrice * 0.1f;

                    }
                }
                tax = (costPrice + profit) * taxRate;
                totalTax = totalTax + tax;
                totalCost = totalCost + costPrice;
                totalProfit = totalProfit + profit;
                salePrice = costPrice + profit + tax;
            }
        }

        Console.ReadKey();
    }
}

class PriceCalc
{
    static int readInteger (string prompt) 
    {
        Console.WriteLine(prompt);
        // read an int or float from the console, preferably using TryParse.
        priceString = Console.ReadLine();
        return priceString;
    }

    static void Main(string[] args)
    {
        float costPrice = 0.0f;
        float profit;
        ..and so on

// replace these in your main-method;
Console.Write("Enter price of the product : ");
priceString = Console.ReadLine();
// with this
  priceString = readInteger("Enter price of the product : ");

• The signature states an "int", not a float. Might seem a minor detail, but in the case of calculating money, there's always a devil there.
  
• I would go for Int.TryParse[^].
  
• There's a small bug in there that causes the app to exit after entering a product-name. I'd recommend replacing the "nameString.Lengt != 0" with
  
  C#

  if (string.IsNullOrEmpty(nameString))
  

  
  
• It would probably be helpfull to the end user if you also wrote the results to the screen before exiting
  

static int readInteger (string prompt) 

Bastard Programmer from Hell
If you can't read my code, try converting it here[^]

static /*int*/ float readInteger (string prompt) // should be named readFloat !!!
{
    do
    {
       Console.Write(prompt);
       float value;
       if (float.TryParse(Console.ReadLine(), out value))
            return value;
       Console.WriteLine("That is not a valid number");
       Console.WriteLine("Enter a number, e.g. 15.5");
    } while (true);
}

// ...
if (nameString.Length != 0)
{
    finished = true;
}
else
{
    costPrice = readInteger("Enter price of the product : ");
    // It should be named readFloat as I noted above!
 
    if (costPrice < 20.0f)
// ...