Effective way of making negative of image without external dlls

Question

That is the solution to make a negative from a image in C# Windows Forms without any dlls and in a effective, fast way?

Answer 1

Go through all the pixels one by one (Bitmap.GetPixel() or something) and subtract the RGB values from 0xff to create a pixel of negative color. Save this pixel to a new image or onto the same image using (Bitmap.SetPixel()) at the same position.

    // Retrieve the image.
    var image1 = new Bitmap(@"C:\Documents and Settings\All Users\" 
        + @"Documents\My Music\music.bmp", true);

    int x, y;

    // Loop through the images pixels to reset color.
    for(x=0; x