IDisposable More details here: http://www.codeproject.com/Articles/15360/Implementing-IDisposable-and-the-Dispose-Pattern-P

gistfile1.cs

class MyClass : IDisposable
{
    private bool disposed = false;
    protected virtual void Dispose(bool disposing)
    {
        if (!disposed)
        {
            if (disposing)
            {
                // Dispose managed resources
            }

            // Dispose unmanaged resources

            disposed = true;
        }
    }

    ~MyClass()
    {
        Dispose(false);
    }
        
    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }
}

gistfile2.cs

class MyDerivedClass : MyClass
{
    private bool disposed = false; // to detect redundant calls

    public MyDerivedClass()
      :base()
    {
    }

    protected override void Dispose(bool disposing)
    {
       if (!disposed)
       {
            if (disposing)
            {
                // Dispose this class's managed resources
            }

            // Dispose this class's non-managed resources
            disposed = true;
        }

        base.Dispose(disposing);
    }
}