Question: From where can I get image processing libraries in C# .Net?

Answer: 
**edit:** Check out the list here <https://github.com/quozd/awesome-dotnet/blob/master/README.md#image-processing>:

* [ImageResizer](https://imageresizing.net/) - Add commands to image URLs to get altered versions in milliseconds. Resizing, editing etc of images in real-time.
* [ImageProcessor](https://github.com/JimBobSquarePants/ImageProcessor) - Open-source .NET library to manipulate images on-the-fly.
* [DynamicImage](http://dynamicimage.apphb.com/) - High-performance open-source image manipulation library for ASP.NET.
* [MetadataExtractor](https://github.com/drewnoakes/metadata-extractor-dotnet) - Extracts Exif, IPTC, XMP, ICC and other metadata from image files.
* [Emgu CV](http://www.emgu.com/wiki/index.php/Main_Page) - Cross-platform .NET wrapper for the OpenCV library.
* [DotImaging](https://github.com/dajuric/dot-imaging) - Minimalistic .NET imaging portable platform
* [Magick.NET](https://github.com/dlemstra/Magick.NET) - .NET wrapper for the ImageMagick library.
* [OpenCvSharp](https://github.com/shimat/opencvsharp/) - Cross platform wrapper of OpenCV for .NET Framework.

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Check the [AForge](http://code.google.com/p/aforge/) library. It is a set of libraries in which you'll find an image processing and a vision library.
There [emguCV](http://www.emgu.com/wiki/index.php/Main_Page) (for .NET) that is based on C++ OpenCV, which is very popular.