请用c#写出以下题目显示九九乘法表

以下是使用 C# 语言编写的九九乘法表代码：

using System;

class Program
{
    static void Main(string[] args)
    {
        for (int i = 1; i <= 9; i++)
        {
            for (int j = 1; j <= i; j++)
            {
                Console.Write($"{j} * {i} = {i*j}\t");
            }
            Console.WriteLine();
        }
    }
}

输出结果：

1 * 1 = 1
1 * 2 = 2     2 * 2 = 4
1 * 3 = 3     2 * 3 = 6     3 * 3 = 9
1 * 4 = 4     2 * 4 = 8     3 * 4 = 12    4 * 4 = 16
1 * 5 = 5     2 * 5 = 10    3 * 5 = 15    4 * 5 = 20    5 * 5 = 25
1 * 6 = 6     2 * 6 = 12    3 * 6 = 18    4 * 6 = 24    5 * 6 = 30    6 * 6 = 36
1 * 7 = 7     2 * 7 = 14    3 * 7 = 21    4 * 7 = 28    5 * 7 = 35    6 * 7 = 42    7 * 7 = 49
1 * 8 = 8     2 * 8 = 16    3 * 8 = 24    4 * 8 = 32    5 * 8 = 40    6 * 8 = 48    7 * 8 = 56    8 * 8 = 64
1 * 9 = 9     2 * 9 = 18    3 * 9 = 27    4 * 9 = 36    5 * 9 = 45    6 * 9 = 54    7 * 9 = 63    8 * 9 = 72    9 * 9 = 81