使用C#实现求出若干组整数之和为500的连续序列(web面试题)

无意间在网上看到这个计算题.小弟闲暇时写了一下.求有木有更便捷的写法

 1  private void button1_Click(object sender, EventArgs e)
 2         {
 3             //先求出最多有多少个整数相加.明显从1开始
 4             int a = 0;
 5             int bignum = 0;
 6             for (int i = 1; i <=500; i++)
 7             {
 8                 if (a <= 500)
 9                 {
10                     a = a + i;
11                     bignum = i;
12                 }
13             }
14             string s = ""; 
15             
16             for (int j = 1; j <=500; j++)
17             {
18                int c = 0;
19                 int d = j;
20                 for (int k= 1;k <= bignum; k++)
21                 {
22                     c=j+ k;
23                     d += c;
24                     if (d == 500)
25                     {
26                         s = j.ToString() + "-" + k.ToString() + ",";
27                     }
28                 }
29             }
30             MessageBox.Show(s);
31         }