Releases the unmanaged resources used by the System.Windows.Forms.ToolBarButton and optionally releases the managed resources.
This method is called by the public Dispose method and the object.Finalize method. Dispose invokes the protected Dispose(Boolean) method with the disposing parameter set to true. object.Finalize invokes Dispose with disposing set to false.
When the disposing parameter is true, this method releases all resources held by any managed objects that this System.Windows.Forms.ToolBarButton references. This method invokes the Dispose method of each referenced object.