您不能向数组添加项，因为它具有固定长度.您正在寻找的是一个 List，稍后可以使用 list.ToArray() 将其转换为数组，例如

You can't add items to an array, since it has fixed length. What you're looking for is a List<string>, which can later be turned to an array using list.ToArray(), e.g.

List<string> list = new List<string>();
list.Add("Hi");
String[] str = list.ToArray();