C # Bitmap GetPixel inefficient, too slow alternative method

New class

     Public classdirectbitmap:idisposable { PublicBitmap Bitmap {Get;Private Set; } int[] Bits =NULL;  Public intHeight {Get;Private Set; }  Public intWidth {Get;Private Set; } protectedGCHandle Bitshandle {Get;Private Set; }  PublicDirectbitmap (intWidthintheight) {Width=width; Height=height; Bits=New int[Width *height]; Bitshandle=GCHandle.Alloc (Bits, gchandletype.pinned); Bitmap=NewBitmap (width, height, Width *4, Pixelformat.format32bpppargb, Bitshandle.addrofpinnedobject ()); }         Public voidSetPixel (intXinty, Color colour) {Setpixelrgb (x, y, colour).        ToArgb ()); }         Public voidSetpixelrgb (intXintYintcolour) {bits[x+ (Y * Width)] =colour; }         PublicColor GetPixel (intXinty) {returnColor.FromArgb (Getpixelrgb (x, y)); }         Public intGetpixelrgb (intXinty) {returnBits[x + (Y *Width)]; }        Private BOOLdisposed =false;  Public voidDispose () {if(disposed)return; Disposed=true;            Bitmap.dispose ();        Bitshandle.free (); }    }

When used:

Declare the Directbitmap instance and access the bitmap of the Directbitmap. Use Directbitmap's GetPixel method to get the color

            New Directbitmap (RC. RIGHT-RC. Left, RC. Bottom- RC. TOP);             using (Graphics GP = graphics.fromimage (image). Bitmap))            {                = GP. GetHdc ();                 0 );                Gp. ReleaseHdc ();            }

C # Bitmap GetPixel inefficient, too slow alternative method