title: OpenAPI Client Generator combine multiple files and projects
body: <p>I'm using the OpenAPI generator(<a href="https://github.com/OpenAPITools/openapi-generator" rel="nofollow noreferrer">https://github.com/OpenAPITools/openapi-generator</a>) to generate a C# client.</p>
  
  <p>I get two C# projects(OpenAPITools and OpenAPITools.Test) - </p>
  
  <p><a href="https://i.stack.imgur.com/iB8Pe.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iB8Pe.png" alt="enter image description here"></a></p>
  
  <p>Right now with the command below, a .sln and two projects are created - </p>
  
  <pre><code>-jar openapi-generator-cli.jar generate -i 
  libmaster_limited.yml -g csharp -o client_generated
  </code></pre>
  
  <ol>
  <li><p>Is there a way so that only a single project is created containing the content of both the current projects?</p></li>
  <li><p>I have multiple Open API specs and I want them all to be under one single solution(each spec can have it's own project). Is that possible?</p></li>
  </ol>