using System;

using System.IO;

using System.Collections.Generic;

using System.Runtime.Serialization.Formatters.Binary;

​

public class Program

{

    public static void Main()

    {

        var a = new List<int>(); 

        var b = new List<int>(); 

        var c = new List<int>(); 

        for (int i=0; i<100; i++) 

            b.Add(i); 

        for (int i=0; i<200; i++) 

            c.Add(i); 

        Console.WriteLine(GetSize(a)); 

        Console.WriteLine(GetSize(b)); 

        Console.WriteLine(GetSize(c)); 

        Console.WriteLine(); 

        Console.WriteLine("byte:     " + sizeof(byte)); 

        Console.WriteLine("bool:     " + sizeof(bool)); 

        Console.WriteLine("int:       " + sizeof(int)); 

        Console.WriteLine("Int32:   " + sizeof(Int32));

        Console.WriteLine("Int64:   " + sizeof(Int64));

        Console.WriteLine("DayOfWeek: " + sizeof(DayOfWeek));

        //Console.WriteLine(sizeof(string)); 

    } 

    static long GetSize(object o) { 

        long size = 0; 

        using (Stream s = new MemoryStream()) { 

            var formatter = new BinaryFormatter(); 

            formatter.Serialize(s, o); 

            size = s.Length; 

        } 

        return size;        

    }

}