Ho从得分百分位数获取LINQ中的键和值

using System;
using System.Collections.Generic;
using System.Linq;

class Program
{
    static void Main()
    {
        var scores = new Dictionary<string, int>()
        {
            {"Alice", 85},
            {"Bob", 92},
            {"Charlie", 78},
            {"David", 90},
            {"Eve", 87}
        };

        var percentile = 90;

        var result = scores
            .Where(pair => pair.Value >= percentile)
            .ToDictionary(pair => pair.Key, pair => pair.Value);

        Console.WriteLine($"键值对总数: {result.Count}");
        foreach (var pair in result)
        {
            Console.WriteLine($"键: {pair.Key}，值: {pair.Value}");
        }
    }
}

键值对总数: 3
键: Bob，值: 92
键: David，值: 90
键: Eve，值: 87