Round #839

Write a generic Swap<T> method that swaps two ref T parameters. Include an example call with two ints.

```csharp using System; public class Program { public static void Swap<T>(ref T a, ref T b) { T temp = a; a = b; b = temp; } public static void Main() { int x = 5; int y = 10; Console.WriteLine("Before swap: x = " + x + ", y = " + y); Swap(ref x, ref y); Console.WriteLine("After swap: x = " + x + ", y = " + y); } } ```

```csharp public static class Swapper { public static void Swap<T>(ref T a, ref T b) { T temp = a; a = b; b = temp; } } class Program { static void Main() { int x = 5; int y = 10; Console.WriteLine("Before swap: x = " + x + ", y = " + y); Swapper.Swap(ref x, ref y); Console.WriteLine("After swap: x = " + x + ", y = " + y); } } ``` This code defines a generic `Swap` method that takes two `ref` parameters of type `T` and swaps their values. The `Main` method demonstrates how to use this `Swap` method with two `int` variables.