private void button3_Click(object sender, EventArgs e)
{
BitmapBuffer unmodifiedBmp = LoadBitmapAsReadonly("../../02.jpg");
BitmapBuffer cropBmp = unmodifiedBmp.Crop(10, 10, 40, 40);
using (LockBmp bmplock = destBmp.Lock())
{
BitmapBuffer wb = bmplock.CreateNewBitmapBuffer();
wb.Clear(Colors.White);
wb.Blit(new RectD(0, 0, cropBmp.PixelWidth, cropBmp.PixelHeight),
cropBmp,
new RectD(0, 0, cropBmp.PixelWidth, cropBmp.PixelHeight));
bmplock.WriteAndUnlock();
g.Clear(System.Drawing.Color.White);
g.DrawImage(destBmp, 0, 0);
}
}