C#数组问题(拆分)

int[] originalArray = new int[] { 1, 2, 3, 4, 5, 6 };
int[] firstArray = new int[3];
int[] secondArray = new int[3];

Array.Copy(originalArray, 0, firstArray, 0, 3);
Array.Copy(originalArray, 3, secondArray, 0, 3);

int[] originalArray = new int[] { 1, 2, 3, 4, 5, 6 };
ArraySegment<int> firstArray = new ArraySegment<int>(originalArray, 0, 3);
ArraySegment<int> secondArray = new ArraySegment<int>(originalArray, 3, 3);

int[] originalArray = new int[] { 1, 2, 3, 4, 5, 6 };
int[] firstArray = originalArray.Take(3).ToArray();
int[] secondArray = originalArray.Skip(3).ToArray();