Csharp/CSharp Tutorial/Class/IDisposable

Complex IDisposable pattern

<source lang="csharp">using System; using System.Collections.Generic; using System.Globalization; using System.IO; using System.Text; using System.Security.Cryptography; class MyClass : IDisposable {

   private IntPtr myHandle = IntPtr.Zero;
   ~MyClass()
   {
       Dispose(false);
   }
   public void Dispose()
   {
       Dispose(true);
       GC.SuppressFinalize(this);
   }
   protected void Dispose(bool disposing)
   {
       IntPtr h = myHandle;
       if (h != IntPtr.Zero)
       {
           h = IntPtr.Zero;
       }
   }

} public class MainClass {

   public static void Main()
   {
       using (MyClass mc = new MyClass())
       {
       }
   }

}</source>

implementation of IDisposable

<source lang="csharp">using System; class MyClass: IDisposable {

    private bool Disposed = false;
    public void Dispose()
    {
          Dispose(true);
          GC.SuppressFinalize(this);
         
    }
    private void Dispose(bool disposing)
    {
          if(!this.Disposed)
          {
                 if(disposing)
                 {
                      //free any managed resources
                 }
                 //free unmanaged resources
          }
          
          Disposed = true;
    }
    ~MyClass()
    {
          Dispose(false);
    }

}</source>

Simple IDisposable pattern

<source lang="csharp">using System; using System.Collections.Generic; using System.Globalization; using System.IO; using System.Text; using System.Security.Cryptography; class MyClass : IDisposable {

   private Stream myStream = null;
   public void Dispose()
   {
       Stream s = myStream;
       if (s != null)
           ((IDisposable)s).Dispose();
   }

} public class MainClass {

   public static void Main()
   {
       using (MyClass mc = new MyClass())
       {
       }
   }

}</source>