title: Create Pub/Sub service WITHOUT third parties tool
body: <p>I would like to find a solution to create a pub/sub medium for 2 microservices to talk to each other,
  I am aware i can use some third parties E.g Redis, RabbitMQ
  <a href="https://docs.microsoft.com/en-us/dotnet/standard/microservices-architecture/multi-container-microservice-net-applications/integration-event-based-microservice-communications" rel="nofollow noreferrer">Implementing event-based communication between microservices (integration events)</a></p>
  
  <p>The challenge lies on the client is unable to allow install any third parties tool due to security reason. 
  The messageQueue server in Windows won't be allowed to use too. 
  I can only use the applications that is only existed in the server.</p>
  
  <p>Therefore i am asking if there is anyway that i can create one simple app using windows service.
  It is a one-to-many relationship. I have one service that will be dealing with data, once if there is any update, it will publish to those services that is subsribed to it.</p>
  
  <p>It seems my problem could be similar with </p>
  
  <p><a href="https://stackoverflow.com/questions/9919804/net-scalable-pub-sub-service-implementation">.NET Scalable Pub/Sub service implementation</a></p>
  
  <p><a href="https://stackoverflow.com/questions/391296/wcf-pub-sub-with-subscriber-caching">WCF Pub/Sub with subscriber caching</a>(link is dead on the WCF pub-sub)</p>
  
  <p>but i dont see any critical solutions. </p>
  
  <p>I was thinking to use data notifications that MSSQL offers as last alternatives, but seems like it could cause a bottle neck when the applications get scale up. 
  The internet is so much flooded with articles using third parties tool. </p>
  
  <p>Thanks </p>