使用linq处理空字符串

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

class Program
{
    static void Main(string[] args)
    {
        List<string> strings = new List<string> { "hello", "", "world", "", "!" };

        // 使用LINQ处理空字符串
        var nonEmptyStrings = strings.Where(s => !string.IsNullOrEmpty(s));

        Console.WriteLine("非空字符串：");
        foreach (var s in nonEmptyStrings)
        {
            Console.WriteLine(s);
        }
    }
}