using System;
using System.Collections.Generic;
using System.Text;


public class MyResourceWrapper : IDisposable {
    public void Dispose() {
        Console.WriteLine("In Dispose() method!");
    }
}

class Program {
    static void Main(string[] args) {
        MyResourceWrapper rw = new MyResourceWrapper();
        if (rw is IDisposable)
            rw.Dispose();
        using (MyResourceWrapper rw2 = new MyResourceWrapper()) {
        }
    }
}

   
     

using System;
using System.Collections.Generic;
using System.Text;

public class Car {
private int currSp;
private string petName;

public Car() { }
public Car(string name, int speed) {
petName = name;
currSp = speed;
}

public override string ToString() {
return string.Format(“{0} is going {1} MPH”,petName, currSp);
}
}
class Program {
static void Main(string[] args) {
Car refToMyCar = new Car(“A”, 100);
Console.WriteLine(refToMyCar.ToString());
Console.WriteLine(GC.GetGeneration(refToMyCar));

object[] tonsOfObjects = new object[50000];
for (int i = 0; i < 50000; i++) tonsOfObjects[i] = new object(); GC.Collect(0); GC.WaitForPendingFinalizers(); Console.WriteLine("Generation of refToMyCar is: {0}",GC.GetGeneration(refToMyCar)); if (tonsOfObjects[9000] != null) { Console.WriteLine("Generation of tonsOfObjects[9000] is: {0}",GC.GetGeneration(tonsOfObjects[9000])); } else Console.WriteLine("tonsOfObjects[9000] is no longer alive."); Console.WriteLine(" Gen 0 has been swept {0} times", GC.CollectionCount(0)); Console.WriteLine("Gen 1 has been swept {0} times", GC.CollectionCount(1)); Console.WriteLine("Gen 2 has been swept {0} times", GC.CollectionCount(2)); } public static void MakeACar() { Car myCar = new Car(); } } [/csharp]

   
 
using System;
namespace Client.Chapter_5___Building_Your_Own_Classes
{
      public class DTOR: IDisposable
      {
           public static int[] MyIntArray;
           private static int ObjectCount = 0;
           private bool Disposed = false;
           static void Main(string[] args)
           {
                 MyIntArray = new int[10];
                  ObjectCount++;
             }
            //Used to clean up and free unmanaged resources

            //Never mark this class as virtual as you do not want derived 
            //classes to be able to override it.
            public void Dispose()
            {
                  //if this class is derived then call the base
                  //class dispose.
                  //base.Dispose();
                  //Call the overloaded version of dispose
                  Dispose(true);
                  //Tell the CLR not to run the finalizer this way
                  //you do not free unmanaged resources twice
                  GC.SuppressFinalize(this);
                 

            }
            //If user calls dispose both managed and unmanaged resources
            //are freed
            //If the finalizer is called then only unmanaged resources are freed
            private void Dispose(bool disposing)
            {
                  if(!this.Disposed)
                  {
                         if(disposing)
                         {
                              //free any managed resources
                         }
  
                         //free unmanaged resources
                  }
                  
                  Disposed = true;
            }
            //This finalizer method is called by the GC,
            //not the user. The net result of having this is that
            //the object will always survive the first GC cycle and
            //will be collected the next time GC1 is collected.

            ~DTOR()
            {
                  Dispose(false);
            }
      }
}


           
         
     

   
  
using System;


public class MyClass {

    public void Dispose() {
        Console.WriteLine("Dispose()");
        GC.SuppressFinalize(this);
    }
}

public class ReRegFinalApp {

    public static void DoSomething() {
        MyClass t = new MyClass();
        Console.WriteLine(t);
        t.Dispose();
        GC.ReRegisterForFinalize(t);

    }

    public static void Main(string[] args) {
        long n = GC.GetTotalMemory(true);
        Console.WriteLine("start of Main: {0} bytes allocated", n);
        DoSomething();
        n = GC.GetTotalMemory(true);
        Console.WriteLine("end of Main: {0} bytes allocated", n);
    }
}

   
     

   
  

using System;
using System.Collections.Generic;
using System.Text;

public class Car {
    private int currSp;
    private string petName;

    public Car() { }
    public Car(string name, int speed) {
        petName = name;
        currSp = speed;
    }

    public override string ToString() {
        return string.Format("{0} is going {1} MPH",
            petName, currSp);
    }
}
class Program {
    static void Main(string[] args) {
        Console.WriteLine("Estimated bytes on heap: {0}", GC.GetTotalMemory(false));
        Console.WriteLine("This OS has {0} object generations.
", (GC.MaxGeneration + 1));

        Car refToMyCar = new Car("Zippy", 100);
        Console.WriteLine(refToMyCar.ToString());

        Console.WriteLine("
Generation of refToMyCar is: {0}", GC.GetGeneration(refToMyCar));
    }

    public static void MakeACar() {
        Car myCar = new Car();
    }
}

   
     

   
  

using System;
using System.Collections.Generic;
using System.Text;

class Program {
    static void Main(string[] args) {
        Console.WriteLine("Estimated bytes on heap: {0}", GC.GetTotalMemory(false));
        Console.WriteLine("This OS has {0} object generations.
", (GC.MaxGeneration + 1));
    }
}

   
     

using System;
using System.Collections.Generic;
using System.Text;

public class Car {
private int currSp;
private string petName;

public Car() { }
public Car(string name, int speed) {
petName = name;
currSp = speed;
}

public override string ToString() {
return string.Format(“{0} is going {1} MPH”,
petName, currSp);
}
}
class Program {
static void Main(string[] args) {
Car refToMyCar = new Car(“Zippy”, 100);
Console.WriteLine(refToMyCar.ToString());
Console.WriteLine(GC.GetGeneration(refToMyCar));

object[] tonsOfObjects = new object[50000];
for (int i = 0; i < 50000; i++) tonsOfObjects[i] = new object(); GC.Collect(0); GC.WaitForPendingFinalizers(); Console.WriteLine(GC.GetGeneration(refToMyCar)); } public static void MakeACar() { Car myCar = new Car(); } } [/csharp]