使用C#将整数集转换为范围

using System;
using System.Collections.Generic;

public class RangeConverter
{
    public static List<string> ConvertToRanges(List<int> numbers)
    {
        List<string> ranges = new List<string>();

        if (numbers == null || numbers.Count == 0)
        {
            return ranges;
        }

        numbers.Sort();

        int start = numbers[0];
        int end = numbers[0];

        for (int i = 1; i < numbers.Count; i++)
        {
            if (numbers[i] - end > 1)
            {
                ranges.Add(GetRangeString(start, end));
                start = numbers[i];
            }

            end = numbers[i];
        }

        ranges.Add(GetRangeString(start, end));

        return ranges;
    }

    private static string GetRangeString(int start, int end)
    {
        if (start == end)
        {
            return start.ToString();
        }
        else
        {
            return start.ToString() + "-" + end.ToString();
        }
    }
}

public class Program
{
    public static void Main(string[] args)
    {
        List<int> numbers = new List<int> { 1, 2, 3, 5, 6, 8, 10, 11, 12 };
        List<string> ranges = RangeConverter.ConvertToRanges(numbers);

        foreach (string range in ranges)
        {
            Console.WriteLine(range);
        }
    }
}