System.Windows.Interop.D3DImage.IAppDomainShutdownListener C# (CSharp) Method

        void IAppDomainShutdownListener.NotifyShutdown()
        {
            if (_pInteropDeviceBitmap != null)
            {
                // Stop unmanaged code from sending us messages because the AppDomain is going down
                UnsafeNativeMethods.InteropDeviceBitmap.Detach(_pInteropDeviceBitmap);
            }

            // The finalizer does the same thing, so it's no longer necessary
            GC.SuppressFinalize(this);
        }