public class FastBitmap

{

    BitmapData bitmapData;

    public FastBitmap(Bitmap bitmap)

    {

        this.bitmapData=bitmap.LockBits(new Rectangle(,,bitmap.Width,bitmap.Height), System.Drawing.Imaging.ImageLockMode.ReadWrite, bitmap.PixelFormat);

    }

    public unsafe Color GetPixel(int x,int y)

    {

        if (bitmapData.PixelFormat == PixelFormat.Format32bppRgb || bitmapData.PixelFormat == PixelFormat.Format32bppArgb)

        {

            byte* numPtr = (byte*)((int)bitmapData.Scan0 + y * bitmapData.Stride + x * );

            return Color.FromArgb(numPtr[],numPtr[], numPtr[],numPtr[]);

        }

        if (bitmapData.PixelFormat == PixelFormat.Format24bppRgb)

        {

            byte* numPtr2 = (byte*)((int)bitmapData.Scan0 + y * bitmapData.Stride + x * );

            return Color.FromArgb(numPtr2[], numPtr2[], numPtr2[]);

        }

        return Color.Empty;

    }

}