they see me trollin...

ObjectSize.cs

using System;
using System.Collections;

namespace ObjectSize
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(SizeOfInstantiatedObjects());
            Console.Read();
        }

        static long SizeOfInstantiatedObjects()
        {
            var l=new ArrayList();var s=GC.GetTotalMemory(true);for(int i=0;i<100000;i++)l.Add(new Object());return GC.GetTotalMemory(true)-s;
        }
    }
}