C#LINQ用有意义的字符串替换空值

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

class Program
{
    static void Main()
    {
        List<string> strings = new List<string> { "apple", null, "banana", "", "orange" };

        var nonEmptyStrings = strings.Select(s => string.IsNullOrEmpty(s) ? "替换值" : s);

        foreach (var s in nonEmptyStrings)
        {
            Console.WriteLine(s);
        }
    }
}