我是一个新手程序员，所以有一些问题。程序只显示3个积极的元素在一个一维数组，虽然可能有更多的二维数组。
这是我代码

using System;

namespace task_2
{
    class arrays
    {
        public int[,] A = new int[3, 3];
        public int[] B = new int[9];
        public void two_dimensional_array()
        {
            Random rand = new Random();
            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    A[i, j] = rand.Next(-100, 100);
                }
            }
            Console.WriteLine("Two-dimensional array: ");
            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    Console.Write("{0}\t", A[i, j]);
                }
                Console.WriteLine();
            }
        }
        public void one_dimensional_array()
        {
            Console.WriteLine("\nA one-dimensional array with only positive elements: ");
            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                        if (A[i, j] > 0)
                            B[i] = A[i, j];
                }

            }
            for (int i = 0; i < 9; i++)
            {
                Console.WriteLine(B[i]);
            }
        }

    }
    class Program
    {
        static void Main()
        {
            Console.OutputEncoding = System.Text.Encoding.Default;
            arrays a;
            a = new arrays();
            a.two_dimensional_array();
            a.one_dimensional_array();
        }
    }
}

我在下面附上了一张结果的照片，其中只显示了三个积极的因素：enter image description here