要从列表中删除所有元素,代码如下-
using System; using System.Collections.Generic; public class Demo { public static void Main(String[] args) { List<String> list1 = new List<String>(); list1.Add("One"); list1.Add("Two"); list1.Add("Three"); list1.Add("Four"); list1.Add("Five"); Console.WriteLine("Elements in List1..."); foreach (string res in list1) { Console.WriteLine(res); } List<String> list2 = new List<String>(); list2.Add("India"); list2.Add("US"); list2.Add("UK"); list2.Add("Canada"); list2.Add("Poland"); list2.Add("Netherlands"); Console.WriteLine("Elements in List2..."); foreach (string res in list2) { Console.WriteLine(res); } Console.WriteLine("\nList2是否等于List1? = "+list2.Equals(list1)); Console.WriteLine("\n列表元素数2 = "+list2.Count); list2.Clear(); Console.WriteLine("\n列表元素数2 (updated) = "+list2.Count); } }
输出结果
这将产生以下输出-
Elements in List1... One Two Three Four Five Elements in List2... India US UK Canada Poland Netherlands List2是否等于List1? = False List2元素数 = 6 List2元素数 (updated) = 0
让我们看另一个例子-
using System; using System.Collections.Generic; public class Demo { public static void Main(String[] args) { List<String> list = new List<String>(); list.Add("One"); list.Add("Two"); list.Add("Three"); list.Add("Four"); list.Add("Five"); Console.WriteLine("Elements in List1..."); foreach (string res in list) { Console.WriteLine(res); } Console.WriteLine("\n列表元素数 = "+list.Count); list.Clear(); Console.WriteLine("\n列表元素数 (updated) = "+list.Count); } }
输出结果
这将产生以下输出-
Elements in List1... One Two Three Four Five 列表元素数 = 5 列表元素数 (updated) = 0