c# - Sharpdx load bitmap fom file Windows 8 apps -

i've found example in sharpdx "bitmapapp" samples:

public static bitmap loadfromfile(rendertarget rendertarget, string file)     {         // loads file using system.drawing.image         using (var bitmap = (system.drawing.bitmap)system.drawing.image.fromfile(file))         {             var sourcearea = new system.drawing.rectangle(0, 0, bitmap.width, bitmap.height);             var bitmapproperties = new bitmapproperties(new pixelformat(format.r8g8b8a8_unorm, alphamode.premultiplied));             var size = new size2(bitmap.width, bitmap.height);              // transform pixels bgra rgba             int stride = bitmap.width * sizeof(int);             using (var tempstream = new datastream(bitmap.height * stride, true, true))             {                 // lock system.drawing.bitmap                 var bitmapdata = bitmap.lockbits(sourcearea, imagelockmode.readonly, system.drawing.imaging.pixelformat.format32bpppargb);                  // convert pixels                  (int y = 0; y < bitmap.height; y++)                 {                     int offset = bitmapdata.stride*y;                     (int x = 0; x < bitmap.width; x++)                     {                         // not optimized                          byte b = marshal.readbyte(bitmapdata.scan0, offset++);                         byte g = marshal.readbyte(bitmapdata.scan0, offset++);                         byte r = marshal.readbyte(bitmapdata.scan0, offset++);                         byte = marshal.readbyte(bitmapdata.scan0, offset++);                         int rgba = r | (g << 8) | (b << 16) | (a << 24);                         tempstream.write(rgba);                     }                  }                 bitmap.unlockbits(bitmapdata);                 tempstream.position = 0;                  return new bitmap(rendertarget, size, tempstream, stride, bitmapproperties);             }         }     } 

but problem works wpf or deskop application.

i want build windows store app system.drawing doesn't exist longer. has been replaced windows.graphics.imaging (replacement of system.drawing in developing windows 8 apps)

i'm beginner , dont know how make function works windows 8.

this function perfect me because want load .png file , want transform it. tried , works in bitmappapp samples.

rendertarget2d.transform = matrix.transformation2d(center, 0f, new vector2(500 / _bitmap.size.width, 900 / _bitmap.size.height), center, 0f,vector2.zero); rendertarget2d.drawbitmap(_bitmap, 1.0f, bitmapinterpolationmode.linear);