How to create and get img og EAN13 barcode in c#

You can use some barcode fonts to create EAN-13 barcode type. This will give you the ability to create a text that is displayed as barcode.

If you want to make the barcode as images, you can create an empty white image and then draw the text using the barcode font on the image.
See the following links that might help you:
http://www.fontpalace.com/font-download/EAN-13/
http://graphicdesign.stackexchange.com/questions/1873/how-to-create-an-ean-13-barcode-with-a-font

Another option is to use a commercial SDK to achieve this. LEADTOOLS supports the EAN-13 barcode type as well as many other barcodes types if you need them. Here is a post with more information:
http://support.leadtools.com/SupportPortal/CS/forums/44074/showpost.aspx
Disclaimer: I'm an employee at LEAD