class PassingRefByRef { static void Change(ref int[] pArray) { // Both of the following changes will affect the original variables: pArray[0] = 888; pArray = new int[5] {-3, -1, -2, -3, -4}; System.Console.WriteLine("Inside the method, the first element is: {0}", pArray[0]); } static void Main() { int[] arr = {1, 4, 5}; System.Console.WriteLine("before calling, the first element is: {0}", arr[0]); Change(ref arr); System.Console.WriteLine("after calling, the first element is: {0}", arr[0]); } } /* Output: Inside Main, before calling the method, the first element is: 1 Inside the method, the first element is: -3 Inside Main, after calling the method, the first element is: -3 */