Select Many example

Select Many :

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

class Program
{

static void Main()
    {
        // Sample list of students, each with a list of courses
        List students = new List
        {
            new Student { Name = "Alice", Courses = new List { "Math", "History" } },
            new Student { Name = "Bob", Courses = new List { "Science", "English" } },
            new Student { Name = "Charlie", Courses = new List { "Math", "Art" } }
        };

        // Using SelectMany to flatten the list of courses
        var allCourses = students.SelectMany(student => student.Courses);

        // Displaying the result
        Console.WriteLine("All Courses:");
        foreach (var course in allCourses)
        {
            Console.WriteLine(course);
        }
    }
}

class Student
{
    public string Name { get; set; }
    public List Courses { get; set; }
}