C# 实现一个支持重复键值的字典_c#实现可以重复键值对的字典

using System;
using System.Collections.Generic;

public class RepeatDictionary<TKey, TValue> : IEnumerable<KeyValuePair<TKey, TValue>>
{
    private readonly List<TKey> _keys = new List<TKey>();

    private readonly List<TValue> _values = new List<TValue>();


    public void Add(TKey key, TValue value)
    {
        _keys.Add(key);
        _values.Add(value);
    }


    IEnumerator<KeyValuePair<TKey, TValue>> IEnumerable<KeyValuePair<TKey, TValue>>.GetEnumerator()
    {
        for (int i = 0; i < _keys.Count; i++)
        {
            yield return new KeyValuePair<TKey, TValue>(_keys[i], _values[i]);
        }
    }

    System.Collections.IEnumerator System.Collections.IEnumerable.GetEnumerator()
    {
        for (int i = 0; i < _keys.Count; i++)
        {
            yield return new KeyValuePair<TKey, TValue>(_keys[i], _values[i]);
        }
    }
}

class Program
{
    static void Main()
    {
        RepeatDictionary<string, string> dictionary = new RepeatDictionary<string, string>()
        {
            {"aa","bb" },
            {"aa","cc" },
            {"aa","dd" },
        };

        foreach (var item in dictionary)
        {
            Console.WriteLine($"{item.Key},{item.Value}");
        }
        Console.ReadKey();
    }
}
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