在C#类中定义字典

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        // 定义一个字典
        Dictionary<string, int> studentScores = new Dictionary<string, int>();

        // 添加键值对
        studentScores.Add("Alice", 95);
        studentScores.Add("Bob", 87);
        studentScores.Add("Charlie", 92);

        // 通过键来访问值
        Console.WriteLine("Bob's score: " + studentScores["Bob"]);

        // 修改值
        studentScores["Charlie"] = 88;

        // 遍历字典
        foreach (var pair in studentScores)
        {
            Console.WriteLine(pair.Key + ": " + pair.Value);
        }

        // 检查键是否存在
        if (studentScores.ContainsKey("Alice"))
        {
            Console.WriteLine("Alice's score: " + studentScores["Alice"]);
        }

        // 删除键值对
        studentScores.Remove("Bob");

        // 清空字典
        studentScores.Clear();
    }
}