指数超出范围。必须是非负的且小于集合的大小？ [英] Index was out of range. Must be non-negative and less than the size of the collection??

问题描述

我这样做很简单，我得到这个错误。当我将TRUE更改为FALSE时它不会给出错误，但测试真正的错误...但我需要通过测试，我不明白..有人可以帮忙吗？ C＃visual studio 2010 NUnit

im doing this simple for and i get this error. When i change TRUE to FALSE it doesnt give that error, but the test real error... but i need the test to pass and i dont understand.. can anybody help? C# visual studio 2010 NUnit

[Test]

public void prueba1()
{

    List<int> lista1 = new List<int>();

    lista1.Add(1);

    lista1.Add(2);

    lista1.Add(3);

    for (int i = 0; i < lista1.Count; i++)
    {

        Console.WriteLine(lista1[i]);
        Assert.True(lista1[i]<lista1[i+1]);

    }

推荐答案

有效列表中的索引是0到2. lista1.Count 将是3，所以 i 从0变为2。当 i 为2时，您尝试访问 lista1 [i + 1] ，这超出了范围。

The valid indexes into your list are 0 through 2.lista1.Count will be 3, so i goes from 0 to 2. When i is 2, you try to access lista1[i+1], which is out of range.

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