Composition, C# - rextester

Language: Layout:

//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 Installer
    {
        private readonly Logger _logger;
        
        public Installer(Logger logger)
        {
            _logger = logger;
        }
        
        public void Install()
        {
            _logger.Log("Installation Started");
            _logger.Log("Installation Complitted");
        }
    }
    
    public class DBmigrator
    {
        private readonly Logger _logger;
        
        public DBmigrator(Logger logger)
        {           
           _logger = logger;
        }
        
        public void Migrate()
        {
            _logger.Log("We are migrating the database");
        }        
    }
    
    public class Calculator
    {
        private readonly SumCalculate _SumCalculate;
        
        public Calculator(SumCalculate sumCalculate)            
        {
            _SumCalculate = sumCalculate;
        }
        
        public int Calcualte()
        {
            var result = _SumCalculate.Add(1, 2, 3, 4, 5); 
            return result;
        }
    }
    
    public class SumCalculate
    {
        public int Add(params int [] numbers)
        {
            var sum = 0;
            foreach (var number in numbers)
            {
                sum += number;
            }            
            return sum;
        } 
    }
            
        
    public class Logger
    {
        public void Log(string message)
        {           
            Console.WriteLine(message);
        }        
    }
    
   
    
    public class Program
    {
        public static void Main(string[] args)
        {
            var dbMigrator = new DBmigrator(new Logger());            
            dbMigrator.Migrate();
            
            var installer = new Installer(new Logger());
            installer.Install();   
            
            var calculator = new Calculator(new SumCalculate());
            var result = calculator.Calcualte();
            Console.WriteLine(result);
           
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,16 sec, absolute running time: 0,11 sec, cpu time: 0,11 sec, average memory usage: 13 Mb, average nr of threads: 3