static void Main(string[] args) {List<string> list = new List<string>();list.Add("abc");ChangeOrNot(list); var query = from p in list select p; foreach (string l in query) { Console.WriteLine(l); }} private static void ChangeOrNot(List<string> list) { list.Add("def"); }輸出abc def,并沒有加ref關鍵字.求解原理.
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