c# - 索引超出数组范围 C#

Question

我试图用数组简化一些长语句，我在这里发现了类似的问题，但我无法弄清楚哪里出错了。代码如下:

if (coursechoice.Text == ("Subsidiary Diploma"))
{               
    var grade = new[] { grade1, grade2, grade3, grade4, grade5, grade6, grade7, grade8, grade9, grade10, grade11, grade12, grade13, grade14, grade15, grade16, grade17, grade18 };
    var unitselect = new[] { unitselect1, unitselect2, unitselect3, unitselect4, unitselect5, unitselect6, unitselect7, unitselect8, unitselect9, unitselect10, unitselect11, unitselect12, unitselect13, unitselect15, unitselect16, unitselect17, unitselect18 };

for (var i = 3; i < 18; i++)
{                   
    grade[i].Enabled = false;
    unitselect[i].Enabled = false; // I get index out of bounds of the array here
}   

代码 grade[I].Enabled= false; 工作正常，但它只有 unitselect 不起作用，如果你能提供帮助，谢谢。

Answer 1

Unitselect 仅包含 17 个项目，没有 unitselect14。