如何在C＃中修复索引超出范围错误消息？

Question

在第49行上获取索引超出范围错误消息“如果（myNumber == myPartyAges [i]）”，我不知道为什么。使用Visual Studio基本设置在这里是代码：

List<int> myPartyAges = new List<int>() { 24, 44, 54, 39, 17, 24, 21 };

int myNumber = myPartyAges[5];
bool contains = false;

for (int i = myPartyAges[5] - 1; i >= 1; i--)
{
    if (myNumber == myPartyAges[i])
    {
        contains = true;
        break;
    }
}

if (contains == true)
{
    Console.WriteLine("Number found.");
}
else
{
    Console.WriteLine("Number not found.");
}

Answer 1

您是想做

for (int i = 4; i >= 0; i--)

代替

for (int i = myPartyAges[5] - 1; i >= 1; i--)

？