Small examples of C# Bitmap copy

public Bitmap CopyBitmap(Bitmap source)
{
    int depth = ();

    if (depth != 8 && depth != 24 && depth != 32)
    {
        return null;
    }

    Bitmap destination = new Bitmap(, , );

    BitmapData source_bitmapdata = null;
    BitmapData destination_bitmapdata = null;

    try
    {
        source_bitmapdata = (new Rectangle(0, 0, , ), ,
                                        );
        destination_bitmapdata = (new Rectangle(0, 0, , ), ,
                                        );

        unsafe
        {
            byte* source_ptr = (byte*)source_bitmapdata.Scan0;
            byte* destination_ptr = (byte*)destination_bitmapdata.Scan0;

            for (int i = 0; i < ( * * (depth / 8)); i++)
            {
                *destination_ptr = *source_ptr;
                source_ptr++;
                destination_ptr++;
            }
        }

        (source_bitmapdata);
        (destination_bitmapdata);

        return destination;
    }
    catch
    {
        ();
        return null;
    }
}