static void Change(int[] myArray) { myArray = new int[5] {3, 1, 2}; } this will not change the array which was passed in and is a purely local change in C

static void Change(int[] myArray) { myArray = new int[5] {3, 1, 2}; } this will not change the array which was passed in and is a purely local change in C#. static void Change(ref int[] myArray) on the other side would change the array which was passed in.