If you want to control when an object’s unmanaged resources are released, you can follow the dispose pattern, implementing a Dispose method.
Here’s a complete example. We create a method to release resources that is called either when a client invokesDispose directly or when the CLR is finalizing the object.
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| public class Dog : IDisposable{ // Prevent dispose from happening more than once private bool disposed = false; // IDisposable.Dispose public void Dispose() { // Explicitly dispose of resources DoDispose(true); // Tell GC not to finalize us--we've already done it manually GC.SuppressFinalize(this); } // Function called via Dispose method or via Finalizer protected virtual void DoDispose(bool explicitDispose) { if (!disposed) { // Free some resources only when invoking via Dispose if (explicitDispose) FreeManagedResources(); // Define this method // Free unmanaged resources here--whether via Dispose // or via finalizer FreeUnmanagedResources(); disposed = true; } } // Finalizer ~Dog() { DoDispose(false); }} |