Delegate Example, 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

//DELEGATE EXAMPLE

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

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            Random rand = new Random();
            int i = rand.Next(0, 100);

ClassA DecisionClass = new ClassA(i);
            ClassB SortingClass = new ClassB(DecisionClass.GetCurrentSorter());
            Console.WriteLine("--BEFORE SORT--");
            SortingClass.PrintList();
            SortingClass.SortTheList();
            Console.WriteLine("--AFTER SORT--");
            SortingClass.PrintList();
            
        }
    }
    
    public class ClassA{
        private ClassB.Sorter sort;
        
        public ClassA(int i){
            
            if(i >= 50){
                sort = SortA;
            }
            else{
                sort = SortB;
            }
        }
        
        public ClassB.Sorter GetCurrentSorter(){
            return sort;
        }
        
        public void SortA(List<int> numbers){
            numbers.Sort((i1, i2) => {return i1.CompareTo(i2);} );
        }
            
        public void SortB(List<int> numbers){
            numbers.Sort((i1, i2) => {return i2.CompareTo(i1);} );
        }
    
    }
    
    
    public class ClassB{
        public delegate void Sorter(List<int> numbers);
        
        private Sorter sorter;
        private List<int> numbers = new List<int>();
        
        public ClassB(Sorter sortFunc){
            sorter = sortFunc;
            Random rand = new Random();
            for(int i = 0; i < 5; i++){
                numbers.Add(rand.Next(0, 100));
            }
        }
        
        public void PrintList(){
            foreach(int num in numbers){
                Console.WriteLine(num);
            }
        }
        
        public void SortTheList(){
            sorter(numbers);
        }
        
    }
    
}

Show compiler warnings [ + ] Show input
Compilation time: 0,12 sec, absolute running time: 0,09 sec, cpu time: 0,09 sec, average memory usage: 14 Mb, average nr of threads: 3