用C#语言编了一个菱形程序，不过有点问题。输出像个三角形，怎么改改？

Question

int i,j,n;
            int number = Convert.ToInt32(Console.ReadLine());
            for ( i = 1; i <= number; i++)
            {
                for (j = 1; j <= number -i; j++)
                    Console.WriteLine(" ");
                for (n = 1; n <i+1; n++)
                    Console.Write(" *");
                Console.WriteLine();
            }
            
            for (i = number-1; i > 0; i--)
            {
                for (j = number -1; j >=i; j--)
                    Console.WriteLine(" ");
                for (n = 1; n < i+1; n++)
                    Console.Write(" *");
                Console.WriteLine();
            }
            Console.WriteLine();
            Console.ReadKey();
        }

Answer 1

把代码直接运行就可以了
using System;
using System.Collections.Generic;
using System.Text;namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            while (true)
            {
                Console.WriteLine("请输入菱形的长：");
                int a = int.Parse(Console.ReadLine());
                for (int i = 0; i < a; i++)
                {
                    for (int j = a - i - 1; j >= 0; j--)
                    {
                        Console.Write(" ");
                        if (j == 0)
                        {
                            for (int k = 0; k < i + 1; k++)
                            {
                                Console.Write("* ");                            }
                            Console.WriteLine();
                        }
                    }                }
                for (int  i = 0; i < a-1; i++)
                {
                    for (int j = 0; j <= i+1; j++)
                    {
                        Console.Write(" ");
                        if (j == i+1)
                        {
                            for (int k = 0; k < a-i-1; k++)
                            {
                                Console.Write("* ");                            }
                            Console.WriteLine();
                        }
                    }
                }
            }
       
        }
    }
}