Round #740

Sort a list of integers in descending order using OrderByDescending.

```csharp using System; using System.Linq; class Program { static void Main() { int[] numbers = { 6, 9, 3, 1, 8, 4, 7, 5, 2 }; var sortedNumbers = numbers.OrderByDescending(n => n); Console.WriteLine(string.Join(", ", sortedNumbers)); } } ```

```csharp using System; using System.Linq; public class Program { public static void Main() { // Create a list of integers var numbers = new[] { 5, 2, 8, 12, 3 }; // Sort the list in descending order using OrderByDescending var sortedNumbers = numbers.OrderByDescending(n => n); // Print the sorted list Console.WriteLine(string.Join(", ", sortedNumbers)); } } ``` This C# code snippet sorts a list of integers in descending order using the `OrderByDescending` method from the `System.Linq` namespace. Here's a step-by-step explanation: 1. **Import necessary namespaces**: The code starts by importing the `System` and `System.Linq` namespaces, which provide the necessary classes and methods for working with collections and querying data. 2. **Create a list of integers**: An array of integers is created and assigned to the `numbers` variable. 3. **Sort the list in descending order**: The `OrderByDescending` method is called on the `numbers` array, passing a lambda expression `n => n` as the key selector. This tells the method to sort the numbers based on their values. The `OrderByDescending` method returns an `IOrderedEnumerable<int>`, which is assigned to the `sortedNumbers` variable. 4. **Print the sorted list**: Finally, the sorted list is printed to the console using `Console.WriteLine` and `string.Join`. The `string.Join` method concatenates the sorted numbers into a single string, separated by commas. When you run this code, it will output: `12, 8, 5, 3, 2`