public override void Dispose()
 {
     _innerHandle?.Dispose();
     _innerHandle = null;
     if (_parent != null)
     {
         TiffPassthroughPixelBufferWriter <TSource, TDestination> parent = _parent;
         _parent = null;
         Interlocked.CompareExchange(ref parent._cachedHandle, this, null);
     }
 }
 internal void SetHandle(TiffPassthroughPixelBufferWriter <TSource, TDestination> parent, TiffPixelSpanHandle <TDestination> handle, int length)
 {
     _parent      = parent;
     _innerHandle = handle;
     _length      = length;
 }