title: Generate c# classes from wsdl
body: <p>I want generate C# classes from wsdl url in ASP.NET Core 2.1.</p>
  
  <p>WSDL url is:<a href="https://airarabia.isaaviations.com/webservices/services/AAResWebServices?wsdl" rel="noreferrer">https://airarabia.isaaviations.com/webservices/services/AAResWebServices?wsdl</a></p>
  
  <p>I used "Microsoft WCF Web Service Reference Provider" tool to generate C# class and got following error:</p>
  
  <blockquote>
    <p>Error: No code was generated.
        If you were trying to generate a client, this could be because the metadata documents did not contain any valid contracts or services
        or because all contracts/services were discovered to exist in /reference assemblies. Verify that you passed all the metadata documents to the tool.
        Done.</p>
  </blockquote>
  
  <p>Any solution will be appreciate.</p>