asp.net下计算数字1至10的总和

protected void Page_Load(object sender, EventArgs e)
{
Response.Write(string.Format("数字1~10总和等于{0}。", Sum(1, 10).ToString()));
}

private int Sum(int min, int max)
{
int s = 0;
for (int i = min; i <= max; i++)
{
s += i;
}
return s;
}

private int Sum(int min, int max)
{
return (max + 1) max / 2;
}