C# List<Dictionary<string，string>> -如何提取唯一键/值对

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

class Program
{
    static void Main(string[] args)
    {
        List<Dictionary<string, string>> data = new List<Dictionary<string, string>>();

        // 添加示例数据
        data.Add(new Dictionary<string, string>() { { "key1", "value1" }, { "key2", "value2" } });
        data.Add(new Dictionary<string, string>() { { "key1", "value1" }, { "key3", "value3" } });
        data.Add(new Dictionary<string, string>() { { "key4", "value4" }, { "key5", "value5" } });

        // 提取唯一键/值对
        HashSet<KeyValuePair<string, string>> uniquePairs = new HashSet<KeyValuePair<string, string>>();
        foreach (var dict in data)
        {
            foreach (var pair in dict)
            {
                if (!uniquePairs.Contains(pair))
                {
                    uniquePairs.Add(pair);
                }
            }
        }

        // 打印唯一键/值对
        foreach (var pair in uniquePairs)
        {
            Console.WriteLine("Key: " + pair.Key + ", Value: " + pair.Value);
        }
    }
}