using System;

       using System.Diagnostics;                

public class Program

{

          public struct TestStruct

      {

         public int Value;

​

      }

      public struct TestStruct2

      {

         public int Value;

​

         public string AString;

      }

      public class TestClass

      {

         public int Value;

      }

      public class TestClass2

      {

         public int Value;

         public string AString;

      }

      private static TestStruct[] _arrayOfTestStructs = new TestStruct[100];

      private static TestStruct2[] _arrayOfTestStruct2 = new TestStruct2[100];

      private static TestClass[] _arrayOfTestClass = new TestClass[100];

      private static TestClass2[] _arrayOfTestClass2 = new TestClass2[100];

    public static void Main()

    {

         var sw = new Stopwatch();

​

         Random rand = new Random();

         GC.Collect();

         GC.WaitForPendingFinalizers();

         Console.WriteLine("struct1");

         Console.WriteLine("Start   : {0:N0}",GC.GetTotalMemory(false));

         sw.Start();

         for (int i = 0; i < 100000; i++)

         {

            _arrayOfTestStructs[rand.Next(100)] = new TestStruct();

         }

         sw.Stop();

         Console.WriteLine(sw.ElapsedMilliseconds);

         sw.Reset();

         Console.WriteLine("Working : {0:N0}", GC.GetTotalMemory(false));

         GC.Collect();

         GC.WaitForPendingFinalizers();

         Console.WriteLine("Collect : {0:N0}", GC.GetTotalMemory(false));

         Console.WriteLine("Class1");

         sw.Start();

         for (int i = 0; i < 100000; i++)

         {

            _arrayOfTestClass[rand.Next(100)] = new TestClass();

         }

         sw.Stop();

         Console.WriteLine(sw.ElapsedMilliseconds);

         sw.Reset();

         Console.WriteLine("Working : {0:N0}", GC.GetTotalMemory(false));

         GC.Collect();

         GC.WaitForPendingFinalizers();

         Console.WriteLine("Collect : {0:N0}", GC.GetTotalMemory(false));

         Console.WriteLine("struct2");

         sw.Start();

         for (int i = 0; i < 100000; i++)

         {

            _arrayOfTestStruct2[rand.Next(100)] = new TestStruct2();

         }

         sw.Stop();

         Console.WriteLine(sw.ElapsedMilliseconds);

         sw.Reset();

         Console.WriteLine("Working : {0:N0}", GC.GetTotalMemory(false));

         GC.Collect();

         GC.WaitForPendingFinalizers();

         Console.WriteLine("Collect : {0:N0}", GC.GetTotalMemory(false));

         Console.WriteLine("Class2");

         sw.Start();

         for (int i = 0; i < 100000; i++)

         {

            _arrayOfTestClass2[rand.Next(100)] = new TestClass2();

         }

         sw.Stop();

         Console.WriteLine(sw.ElapsedMilliseconds);

         sw.Reset();

         Console.WriteLine("Working : {0:N0}", GC.GetTotalMemory(false));

         GC.Collect();

         GC.WaitForPendingFinalizers();

         Console.WriteLine("Collect : {0:N0}", GC.GetTotalMemory(false));

    }

}