Returns a subarray of the given array starting at the given index and having the specified length.

Use ArraySegment() with the given array, arr, start and length to get the subarray.
Convert the result to an array, using ArraySegment.ToArray().

代码实现

using System.Collections.Generic;

public static partial class _30s 
{
  public static T[] Subarray<T>(T[] arr, int start, int length) 
  {
    return new ArraySegment<T>( arr, start, length ).ToArray();
  }
}

使用样例

int[] nums = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };

_30s.Subarray(nums,3,6); // {3, 4, 5, 6, 7, 8}