在 C# 中从 HashSet 中删除集合中的所有元素
csharpserver side programmingprogramming更新于 2025/8/31 18:37:17
要从 HashSet 中删除集合中的所有元素，代码如下 −
示例
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(String[] args){
HashSet<string> set1 = new HashSet<string>();
set1.Add("Ryan");
set1.Add("Tom");
set1.Add("Andy");
set1.Add("Tim");
Console.WriteLine("Elements in HashSet1...");
foreach (string res in set1){
Console.WriteLine(res);
}
HashSet<string> set2 = new HashSet<string>();
set2.Add("John");
set2.Add("Jacob");
set2.Add("Ryan");
set2.Add("Tom");
set2.Add("Andy");
set2.Add("Tim");
set2.Add("Steve");
set2.Add("Mark");
Console.WriteLine("Elements in HashSet2...");
foreach (string res in set2){
Console.WriteLine(res);
}
Console.WriteLine("Is HashSet1 equal to HashSet2? = "+set1.Equals(set2));
set2.ExceptWith(set1);
// 显示 set2 中但不在 set1 中的元素
foreach(string i in set2){
Console.WriteLine(i);
}
}
}
输出
这将产生以下输出 −
Elements in HashSet1... Ryan Tom Andy Tim Elements in HashSet2... John Jacob Ryan Tom Andy Tim Steve Mark Is HashSet1 equal to HashSet2? = False John Jacob Steve Mark
示例
让我们看另一个例子 −
using System;
using System.Collections.Generic;
public class Demo {
public static void Main(String[] args){
HashSet<string> set1 = new HashSet<string>();
set1.Add("Jacob");
set1.Add("Ryan");
set1.Add("Tom");
set1.Add("Andy");
set1.Add("Tim");
set1.Add("Steve");
set1.Add("Mark");
Console.WriteLine("Elements in HashSet1...");
foreach (string res in set1){
Console.WriteLine(res);
}
HashSet<string> set2 = new HashSet<string>();
set2.Add("Kevin");
set2.Add("Jacob");
set2.Add("Ryan");
set2.Add("Tom");
set2.Add("Andy");
set2.Add("Tim");
set2.Add("Steve");
set2.Add("Mark");
Console.WriteLine("Elements in HashSet2...");
foreach (string res in set2){
Console.WriteLine(res);
}
Console.WriteLine("Is HashSet1 equal to HashSet2? = "+set1.Equals(set2));
set2.ExceptWith(set1);
// 显示 set2 中不在 set1 中的元素
foreach(string i in set2){
Console.WriteLine(i);
}
}
}
输出
这将产生以下输出 −
Elements in HashSet1... Jacob Ryan Tom Andy Tim Steve Mark Elements in HashSet2... Kevin Jacob Ryan Tom Andy Tim Steve Mark Is HashSet1 equal to HashSet2? = False Kevin
