Sort a list : Ages of students, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        public class Student
        {
            public string Name { get; set; }
            public int Age {get; set;}
            
        }
                    
               
        
        public static void Main(string[] args)
        {
            //Your code goes here
            //Console.WriteLine("Hello, world!");
            
            Student s = new Student(){ Name = "Ivy", Age = 33};
            Student s1 = new Student(){ Name = "Ryan", Age = 34};
            Student s2 = new Student(){ Name = "Ron", Age = 23};
            Student s3 = new Student(){ Name = "Melvin", Age = 2};
            Student s4 = new Student(){ Name = "Sara", Age = 33};
            Student s5 = new Student(){ Name = "Mars", Age = 43};
            Student s6 = new Student(){ Name = "Pluto", Age = 50};
            Student s7 = new Student(){ Name = "Neptune", Age = 6};
            Student s8 = new Student(){ Name = "Nero", Age = 5};
            Student s9 = new Student(){ Name = "Augustus", Age = 34};
           
            List<Student> list = new List<Student>();
            list.Add(s);
            list.Add(s1);
            list.Add(s2);
            list.Add(s3);
            list.Add(s4);
            list.Add(s5);
            list.Add(s6);
            list.Add(s7);
            list.Add(s8);
            list.Add(s9);
            
                   
            
            int[] studentCount = new int[100];
            
            foreach(Student l in list){
            
                int index = l.Age - 1;
                studentCount[index] = studentCount[index] + 1;
                                     
            }
            
            int[] sortedAgeList = new int[list.Count()];
                
            int currentAge = 0;
            foreach(int i in studentCount)
            {
                currentAge++;
                
                if(i!=0)
                    for(int r=0; r < i; r++)
                       Console.WriteLine(currentAge);
            }
            
            
                
            
        } 
        
        
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,14 sec, absolute running time: 0,11 sec, cpu time: 0,09 sec, average memory usage: 18 Mb, average nr of threads: 4