internal Task <Stream> PlatformOpenReadAsync(ScreenshotFormat format)
{
var f = format switch
{
ScreenshotFormat.Jpeg => Bitmap.CompressFormat.Jpeg,
_ => Bitmap.CompressFormat.Png,
};
var result = new MemoryStream(bmp.AsImageBytes(f, 100)) as Stream;
return(Task.FromResult(result));
}