Deploy Web Service Class Library

Dear All

I am new to web service.  My college left my company and I need to pick up his work to create a new web service.

I found that the project is a class library which include interface and implementation files which are all .cs files

My new task is to copy old code to a new project as it is faster than writing from new.

However, I found the binary folder only contains dll but no asmx.

How to deploy this as web service?

Thank you.

Best Regards

mintssoul