C# Linq OrderBy将null或空值筛选为最后一个值

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

public class Student
{
    public string Name { get; set; }
    public int? Score { get; set; }
}

public class Program
{
    public static void Main()
    {
        List<Student> students = new List<Student>
        {
            new Student { Name = "Alice", Score = 85 },
            new Student { Name = "Bob", Score = null },
            new Student { Name = "Charlie", Score = 78 },
            new Student { Name = "David", Score = 92 }
        };

        var sortedStudents = students
            .OrderBy(s => s.Score.HasValue)
            .ThenBy(s => s.Score ?? int.MinValue)
            .ToList();

        foreach (var student in sortedStudents)
        {
            Console.WriteLine($"{student.Name}: {student.Score}");
        }
    }
}