如何合并Generic.Collection.List和Generic.Collection.Dictionary

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

class Program
{
    static void Main(string[] args)
    {
        List<int> list1 = new List<int> { 1, 2, 3 };
        List<int> list2 = new List<int> { 4, 5, 6 };

        List<int> mergedList = list1.Concat(list2).ToList();

        foreach (int item in mergedList)
        {
            Console.WriteLine(item);
        }
    }
}

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

class Program
{
    static void Main(string[] args)
    {
        Dictionary<int, string> dict1 = new Dictionary<int, string>
        {
            { 1, "One" },
            { 2, "Two" },
            { 3, "Three" }
        };

        Dictionary<int, string> dict2 = new Dictionary<int, string>
        {
            { 4, "Four" },
            { 5, "Five" },
            { 6, "Six" }
        };

        Dictionary<int, string> mergedDict = dict1.Concat(dict2).ToDictionary(x => x.Key, x => x.Value);

        foreach (KeyValuePair<int, string> item in mergedDict)
        {
            Console.WriteLine($"{item.Key}: {item.Value}");
        }
    }
}