如何在LINQ中对匿名对象列表进行分组和合并/展平

// 假设有一个匿名对象列表，包含学生的姓名和所属班级
var students = new[]
{
    new { Name = "Alice", Class = "A" },
    new { Name = "Bob", Class = "B" },
    new { Name = "Charlie", Class = "A" },
    new { Name = "David", Class = "C" },
    new { Name = "Eve", Class = "B" }
};

// 使用group by子句对学生列表按班级进行分组
var groupedStudents = from student in students
                      group student by student.Class into studentGroup
                      select studentGroup;

// 遍历分组结果，可以选择合并或展平
foreach (var group in groupedStudents)
{
    Console.WriteLine("班级: " + group.Key);

    // 合并分组中的学生姓名
    var mergedNames = string.Join(", ", group.Select(student => student.Name));
    Console.WriteLine("学生姓名: " + mergedNames);

    // 展平分组中的学生对象
    var flattenedStudents = group.Select(student => new { Name = student.Name, Class = student.Class });
    foreach (var student in flattenedStudents)
    {
        Console.WriteLine("学生姓名: " + student.Name);
        Console.WriteLine("所属班级: " + student.Class);
    }
}