title: Converting a byte array to PNG/JPG
body: <p>I am currently working on an application that requires high-performance conversion of an unpadded byte array to either a PNG or JPEG. The image format doesn't matter, just as long as it's fast.</p>
  
  <p>I have tried the .NET libraries and the performance is very bad. Can anyone recommend a good freeware library for this?</p>
  
  <p>EDIT: the byte[] is an 8bit grayscale bitmap</p>