刚刚学C#，实在想不明白怎么把直角输出成  金字塔形式了。。。希望大神讲解  教导一下！  
小弟在这里谢过了！！！

static void Main(string[] args)
        {
            Console.WriteLine("请输入自己想要的行数,记得要比你想要的大1哦！");
            int line = Convert.ToInt32(Console.ReadLine());
            int[][] sum = new int[line][];
            string output = "";
            for (int single = 0; single < sum.Length; single++)
            {
                string once = "";
                sum[single] = new int[single];
                for (int row = 0; row < single; row++)
                {
                    if (row == 0 || row == sum[single].Length - 1)
                    {
                        sum[single][row] = 1;
                    }
                    else
                    {
                        sum[single][row] = sum[single - 1][row - 1] + sum[single - 1][row];
                    }
                    once = once + sum[single][row] + "  ";
                }
                output = output + once + "\n";
            }
            Console.WriteLine(output);
            Console.ReadKey();