使用Linq将一个字典映射到另一个字典

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, "Apple" },
            { 2, "Banana" },
            { 3, "Orange" }
        };

        Dictionary<int, string> dict2 = dict1.Select(kv => new { Key = kv.Key, Value = kv.Value.ToUpper() })
                                            .ToDictionary(kv => kv.Key, kv => kv.Value);

        foreach (var item in dict2)
        {
            Console.WriteLine($"Key: {item.Key}, Value: {item.Value}");
        }
    }
}