在C#中加入/合并数组

using System;

class Program
{
    static void Main()
    {
        int[] array1 = { 1, 2, 3 };
        int[] array2 = { 4, 5, 6 };
        int[] array3 = { 7, 8, 9 };

        int[] combinedArray = array1.Concat(array2).Concat(array3).ToArray();

        Console.WriteLine("Combined array:");
        foreach (int element in combinedArray)
        {
            Console.WriteLine(element);
        }
    }
}

Combined array:
1
2
3
4
5
6
7
8
9