在C#中，要清空HashSet集合，可以使用Clear()方法。以下是一个示例：
using System;
using System.Collections.Generic;
class Program
{
static void Main()
{
HashSet<int> myHashSet = new HashSet<int> { 1, 2, 3, 4, 5 };
Console.WriteLine("HashSet before clearing: " + string.Join(", ", myHashSet));
myHashSet.Clear();
Console.WriteLine("HashSet after clearing: " + string.Join(", ", myHashSet));
}
}
输出结果：
HashSet before clearing: 1, 2, 3, 4, 5
HashSet after clearing:
