如何使用Linq对字符串列表进行分组？

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

class Program
{
    static void Main()
    {
        List<string> strings = new List<string>
        {
            "apple",
            "banana",
            "cat",
            "dog",
            "elephant",
            "fish",
            "apple",
            "cat"
        };

        var groupedStrings = strings.GroupBy(s => s);

        foreach (var group in groupedStrings)
        {
            Console.WriteLine("Group: " + group.Key);
            Console.WriteLine("Count: " + group.Count());
            Console.WriteLine("Items: " + string.Join(", ", group));
            Console.WriteLine();
        }
    }
}