using System;

namespace RecipeApp
{
class Recipe
{
public string[] Ingredients { get; set; }
public string[] Steps { get; set; }

public void DisplayRecipe()
{
Console.WriteLine("Ingredients:");
foreach (string ingredient in Ingredients)
{
Console.WriteLine("- " + ingredient);
}

Console.WriteLine("\nSteps:");
for (int i = 0; i < Steps.Length; i++)
{
Console.WriteLine((i + 1) + ". " + Steps[i]);
}
}

public void ScaleRecipe(double factor)
{
Console.WriteLine("\nScaled Recipe:");
foreach (string ingredient in Ingredients)
{
string[] parts = ingredient.Split(' ');
double quantity = Convert.ToDouble(parts[0]) * factor;
Console.WriteLine("- " + quantity + " " + parts[1] + " " + parts[2]);
}
}
}

class Program
{
static void Main(string[] args)
{
Recipe recipe = new Recipe();

Console.Write("Enter the number of ingredients: ");
int numIngredients = Convert.ToInt32(Console.ReadLine());
string[] ingredients = new string[numIngredients];
for (int i = 0; i < numIngredients; i++)
{
Console.Write("Enter ingredient " + (i + 1) + ": ");
string ingredient = Console.ReadLine();

Console.Write("Enter the quantity " + (i + 1) + ": ");
string quantity = Console.ReadLine();

Console.Write("Enter the measurement " + (i + 1) + " (cup, Kg, ml, L, g): ");
string measurement = Console.ReadLine();

ingredients[i] = quantity + " " + measurement + " " + ingredient;
}
recipe.Ingredients = ingredients;

Console.Write("\nEnter the number of steps: ");
int numSteps = Convert.ToInt32(Console.ReadLine());
string[] steps = new string[numSteps];
for (int i = 0; i < numSteps; i++)
{
Console.Write("Enter step " + (i + 1) + ": ");
steps[i] = Console.ReadLine();
}
recipe.Steps = steps;

recipe.DisplayRecipe();

Console.Write("\nEnter a scaling factor (0.5, 2, or 3): ");
double factor = Convert.ToDouble(Console.ReadLine());
recipe.ScaleRecipe(factor);

Console.WriteLine("\nPress any key to clear recipe and enter a new one...");
Console.ReadKey();
Console.Clear();

Main(args);
}
}
}

explain every single line of code

1. `using System;`: This line includes the System namespace, which contains classes and methods that are commonly used in C# programming.

3-11. `Recipe` class: This class represents a recipe and contains two properties - Ingredients and Steps. The Ingredients property is an array of strings representing the ingredients in the recipe, and the Steps property is an array of strings representing the steps to prepare the recipe.

13-27. `DisplayRecipe` method: This method displays the ingredients and steps of the recipe. It loops through the Ingredients array and prints each ingredient with a bullet point. Then, it loops through the Steps array and prints each step with a step number.

29-40. `ScaleRecipe` method: This method scales the recipe by a given factor. It loops through the Ingredients array, splits each ingredient into parts (quantity, measurement, ingredient), and multiplies the quantity by the factor. It then prints the scaled ingredient.

42-59. `Program` class: This class contains the Main method, which is the entry point of the program.

61-90. `Main` method: This method prompts the user to enter the number of ingredients, ingredients, number of steps, and steps for the recipe. It then sets the Ingredients and Steps properties of the Recipe object with the user input. It then displays the recipe, prompts the user to enter a scaling factor, scales the recipe based on the factor, and prompts the user to enter a new recipe or clear the current recipe.

The `Console.ReadKey()` and `Console.Clear()` methods are used to wait for user input and clear the console screen, respectively.

The `Main(args)` line at the end of the Main method is a recursive call to restart the program after the user has entered a new recipe.