OrderBy and sorting in C Sharp (C#) - Mini Project: Build & Apply

Sorting a List of Products by Price

📖 Scenario: You work in a store and have a list of products with their prices. You want to show the products sorted by their price from lowest to highest.

🎯 Goal: Build a small program that creates a list of products with prices, then sorts them by price using OrderBy, and finally prints the sorted list.

📋 What You'll Learn

Create a list of products with exact names and prices

Create a variable to hold the sorted products using OrderBy

Use a foreach loop to print each product name and price

💡 Why This Matters

🌍 Real World

Sorting products by price helps customers find cheaper or more expensive items easily in online stores or inventory systems.

💼 Career

Sorting and ordering data is a common task in software development, especially in e-commerce, data analysis, and user interface design.

1

Create the list of products

Create a list called products of type List<KeyValuePair<string, double>> with these exact entries: ("Apple", 1.20), ("Banana", 0.50), ("Cherry", 2.00), ("Date", 3.00), ("Elderberry", 1.50).

C Sharp (C#)

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        // Create the list of products with exact entries here
        
    }
}

Need a hint?

Use new List<KeyValuePair<string, double>> { ... } and add each product with new KeyValuePair<string, double>(name, price).

2

Create a sorted list using OrderBy

Create a variable called sortedProducts that stores the products sorted by price using products.OrderBy(p => p.Value). Add using System.Linq; at the top if needed.

C Sharp (C#)

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        List> products = new List>
        {
            new KeyValuePair("Apple", 1.20),
            new KeyValuePair("Banana", 0.50),
            new KeyValuePair("Cherry", 2.00),
            new KeyValuePair("Date", 3.00),
            new KeyValuePair("Elderberry", 1.50)
        };

        // Create sortedProducts using OrderBy here
        
    }
}

Need a hint?

Use var sortedProducts = products.OrderBy(p => p.Value); to sort by the price.

3

Print the sorted products

Use a foreach loop with variables product to iterate over sortedProducts. Inside the loop, print the product name and price using Console.WriteLine($"{product.Key}: {product.Value}").

C Sharp (C#)

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        List> products = new List>
        {
            new KeyValuePair("Apple", 1.20),
            new KeyValuePair("Banana", 0.50),
            new KeyValuePair("Cherry", 2.00),
            new KeyValuePair("Date", 3.00),
            new KeyValuePair("Elderberry", 1.50)
        };

        var sortedProducts = products.OrderBy(p => p.Value);

        // Print each product name and price here
        
    }
}

Need a hint?

Use foreach (var product in sortedProducts) and print with Console.WriteLine($"{product.Key}: {product.Value}").

4

Run and see the sorted output

Run the program and observe the output. It should print the products sorted by price from lowest to highest.

C Sharp (C#)

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        List> products = new List>
        {
            new KeyValuePair("Apple", 1.20),
            new KeyValuePair("Banana", 0.50),
            new KeyValuePair("Cherry", 2.00),
            new KeyValuePair("Date", 3.00),
            new KeyValuePair("Elderberry", 1.50)
        };

        var sortedProducts = products.OrderBy(p => p.Value);

        foreach (var product in sortedProducts)
        {
            Console.WriteLine($"{product.Key}: {product.Value}");
        }
    }

    // Run the program to see the output
}

Need a hint?

The output should list products sorted by price from lowest to highest.