清单的使用 <T> 在C＃中

Question

我不得不练习用C＃编写一个小程序。 我必须输入几个名称，如果names.count == 1，则仅显示：

"aName Liked post."

if names.count ==2 then:
"aName and bName liked post."

if names.count > 2 then (for example count == 5):

"aName, bName and 3 others liked post."

> 2和== 1可以正常工作，但是当有2个名称，即== 2时，会抛出未处理的异常：

“ 未处理的异常：System.FormatException：索引（从零开始）必须大于或等于零且小于参数列表的大小 ”

var names = new List<string>();

while (true)
{
    Console.WriteLine("Enter name or hit ENTER to quit:");
    var input = Console.ReadLine();

    if (String.IsNullOrWhiteSpace(input))
    {
        break;
    }

    names.Add(input);

}
if (names.Count > 2)
{
    Console.WriteLine("{0},{1} and {2} others liked your post.",names[0], names[1], names.Count-2);
} else if (names.Count == 2)
{
    Console.WriteLine("{0} and {1} liked your post.", names[0], names[1]);
}
else if (names.Count == 1)
{
    Console.WriteLine("{0} liked your post.", names[0]);
}

else 
{
    Console.WriteLine("No one liked");
}

Answer 1

更改

Console.WriteLine("{0} and {2} liked your post.", names[0], names[1]);

至

Console.WriteLine("{0} and {1} liked your post.", names[0], names[1]);

{2}表示“将第三个参数插入此处”。 但是您真的想通过第二。