Create CGImage from an array of bytes (pixels)

Hey,

I'm fairly new to iOS and Xamarin. I dove into image editing and immediately hit a brick wall. I'm using CGBitmapContext to feed image information into a byte[] array. After that, I'm manipulating that array to create a custom image, or so is the plan. Now I'm wondering how to turn these bytes back into a CGImage. I've tried the CGImage constructor, but that didn't seem to work. The image appears to just be white. My code looks roughly something like that:

//data is the byte[] array containing pixel information
CGDataProvider provider = new CGDataProvider(data);
CGImage image = new CGImage(width, height, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpace, CGBitmapFlags.PremultipliedLast, provider, null, true, CGColorRenderingIntent.Default);

Is this even the right approach? Does the constructor expect different parameters or should this work and I'm doing something wrong elsewhere? Any help is appreciated!