ASP.net image editor with layering

I need an image editor which I can add to my ASP.net project, as an image edito开发者_StackOverflow社区r for DMS, so user can open the selected image with the desired editor and then he can edit and add new layer (i.e. his signature).

I need something just like this http://pixlr.com/ but the problem with the latter is being online only !!

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Pixlr now provides the API to work with which you can use in your site.

There are also a few tutorials hosted on youtube you can look into.