如何在c#中实现分组列表，不需要前缀就能显示结果？

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

public class Program
{
    public static void Main(string[] args)
    {
        List<string> names = new List<string>()
        {
            "John", "Jane", "Alice", "Bob", "Charlie", "David", "Eve"
        };

        var groupedNames = names.GroupBy(n => n[0])
                                .Select(g => new { GroupKey = g.Key, Names = g.ToList() });

        foreach (var group in groupedNames)
        {
            Console.WriteLine($"Group {group.GroupKey}:");
            foreach (var name in group.Names)
            {
                Console.WriteLine(name);
            }
            Console.WriteLine();
        }
    }
}