從Arraylist轉換為字符串

Question

我使用Random Class從ArrayList中獲取一個元素。 目前我正在嘗試使用ToString將此元素轉換為字符串（失敗）。 我如何將解決方案[r]轉換為字符串？

ArrayList Solutions = new ArrayList(5);
Solutions.Add("The Odyssey");
Solutions.Add("Dune");
Solutions.Add("Sherlock Holmes");
Solutions.Add("Othello");
Solutions.Add("Of Mice and Men");

Random ran = new Random();
int r = ran.Next(Solutions.Count); 

string s = Solutions[r].ToString;

Answer 1

string s = Solutions[r].ToString(); // you're missing brackets

Answer 2

使用IList<string>使它更容易和干凈。

IList<string> Solutions = new List<string>(5);
Solutions.Add("The Odyssey");
Solutions.Add("Dune");
Solutions.Add("Sherlock Holmes");
Solutions.Add("Othello");
Solutions.Add("Of Mice and Men");

Random ran = new Random();
int r = ran.Next(Solutions.Count); 

string s = Solutions[r];

Answer 3

List<String> solutions = new List<String>();

solutions.Add("The Odyssey");
solutions.Add("Dune");
// and so on

那么你也能：

label1 = solution[random_index]; // starts with 0