📅  最后修改于: 2022-03-11 15:00:02.098000             🧑  作者: Mango
string output = "";
ArrayList arrayList = new ArrayList();
arrayList.Add("one");
arrayList.Add("two");
arrayList.Add("three");
arrayList.OfType().ToList().ForEach(k => output += k + ",");
TextBox1.Text = output;