C#静态二维数组的题

在控制台项目中，定义一个静态2维数组{{10.8.20},{20.14.10},{10.20.50},{50.10.25},{4.8.20}},求数组中每行元素的平均值，并分行输出数组元素，并在每行后输出该数组的元素平均值 用Microsoft Visual Studio 这个软件

题主要的代码如下，有帮助麻烦点个采纳【本回答右上角】，谢谢~~

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using System;
namespace F3
{
    class Program
    {
        static void Main(string[] args)
        {
            var items = new double[,]{ { 10, 8, 20 }, { 20, 14, 10 }, { 10, 20, 50 }, { 50, 10, 25 }, { 4, 8, 20} };

            var rows = items.GetUpperBound(0)+1;//行数
            var cols = items.GetUpperBound(1)+1;//列数
            for (var row = 0; row < rows; row++) {
                var sum = 0d;
                for (var col = 0; col < cols; col++)
                {
                    sum += items[row, col];
                    Console.Write("{0,-8}", items[row, col] );
                }
                Console.WriteLine(sum / cols);
            }


            Console.ReadKey();
        }
    }
}


using System;
 
public class Test
{
    public static void Main()
    {
        int[,] a = new int[5, 3] {{10,8,0},{20,14,10},{10,20,50},{50,10,25},{4,8,20}};
        double temp = 0,sum=0;
        for (int i = 0; i < 5; i++)
        {
            temp=0;
            for (int j = 0; j< 3; j++)
            {
                temp=temp+a[i,j];
                sum+=a[i,j];
            }
            Console.WriteLine("平均值为{0}", temp/3.0);
        }
        Console.WriteLine("总体平均值为{0}", sum);
    }
}

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