static double Average(List<int> list)//计算平均值
{
int sum = 0;
foreach (var i in list)//循环求值
{
sum += i;
}
return (double)sum / list.Count();
}
static void Main(string[] args)
{
var list = new List<int>();
list.Add(5);
list.Add(6);
list.Add(9);
Console.WriteLine(\”平均值等于{0}\”, Average(list));
Console.ReadLine();
}