要将元素插入到指定索引处的Collection中,代码如下-
using System; using System.Collections.ObjectModel; public class Demo { public static void Main(){ Collection<string> col = new Collection<string>(); col.Add("Laptop"); col.Add("Desktop"); col.Add("Notebook"); col.Add("Ultrabook"); col.Add("Tablet"); col.Add("Headphone"); col.Add("Speaker"); Console.WriteLine("Elements in Collection..."); foreach(string str in col){ Console.WriteLine(str); } Console.WriteLine("Element at index 3 = " + col[3]); Console.WriteLine("Element at index 4 = " + col[4]); col.Insert(5, "Alienware"); Console.WriteLine("Elements in Collection...UPDATED"); foreach(string str in col){ Console.WriteLine(str); } } }
输出结果
这将产生以下输出-
Elements in Collection... Laptop Desktop Notebook Ultrabook Tablet Headphone Speaker Element at index 3 = Ultrabook Element at index 4 = Tablet Elements in Collection...UPDATED Laptop Desktop Notebook Ultrabook Tablet Alienware Headphone Speaker
现在让我们来看另一个示例-
using System; using System.Collections.ObjectModel; public class Demo { public static void Main(){ Collection<string> col = new Collection<string>(); col.Add("Andy"); col.Add("Kevin"); col.Add("John"); col.Add("Kevin"); col.Add("Mary"); col.Add("Katie"); col.Add("Barry"); col.Add("Nathan"); Console.WriteLine("Elements in Collection..."); foreach(string str in col){ Console.WriteLine(str); } col.Insert(3, "Jacob"); Console.WriteLine("Elements in Collection...UPDATED"); foreach(string str in col){ Console.WriteLine(str); } } }
输出结果
这将产生以下输出-
Elements in Collection... Andy Kevin John Kevin Mary Katie Barry Nathan Elements in Collection...UPDATED Andy Kevin John Jacob Kevin Mary Katie Barry Nathan