license plate recognition in asp.net c# can i get the code?

Usually the OCR Part can be done at server-side as a web-service. Or you can use any cloud services that accepts request and returns the recognition results.
LEADTOOLS has OCR features, for more information see these links:
- For Cloud services:
https://services.leadtools.com/documentation/tutorials/net-cs-extracttext-tutorial

- HTML5/JS OCR web:
https://demo.leadtools.com/JavaScript/OCR/index.html