用C#代码在控制台上打印图案

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace demo
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 1; i <= 5; i++) {

                for (int k = 5; k >= i; k--) {
                    Console.Write(" ");
                }
                for (int j = 1; j <= i; j++) {
                    Console.Write("*");
                }
                for (int h = 1; h < i; h++) {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            for (int i = 4; i >=0; i--)
            {

                for (int k = 6; k>i; k--)
                {
                    Console.Write(" ");
                }
                for (int j = 1; j <= i; j++)
                {
                    Console.Write("*");
                }
                for (int h = 1; h < i; h++)
                {
                    Console.Write("*");
                }
                Console.WriteLine();
            }
            Console.ReadKey();
        }
    }
}
运行结果是这样的：

     *
    ***
   *****
  *******
 *********
  *******
   *****
    ***
     *

总结：代码不够紧凑、也不够专业，循环太多，浪费时间，寻找更好的解决方案。