New Post: Reduce size of PNG with minimal quality loss

Hello
I'm trying to reduce the size of PNG image using following code:

using (var bitmap = new MagickImage("test.png"))
{
    bitmap.Resize(800, 600);
    
    bitmap.Quality = 100;
    bitmap.Format = MagickFormat.Png;
    
    bitmap.Write("test.resized.png");
}

But I see that image loses quality tragically.
What is the best way to reduce the size of PNG image with minimal quality loss?