Saving Photo To PNG Frame

I think you can do this by loading your PNG image to System.Drawing.Image object, and then merge it with the other image using the Graphics.DrawImage() method.

You can find sample code here:

http://www.codeproject.com/Articles/12789/Merging-Images-in-NET

If you are looking for more advanced options, you can try the combineCommand class from leadtools. More details can be found here:

https://www.leadtools.com/help/leadtools/v19/dh/pe/leadtools.imageprocessing.effects~leadtools.imageprocessing.effects.combinecommand.html